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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your Class 11 knowledge and support exam preparation. Choose a topic below to get started.
| 39901. |
If a bimetallic strip made of iron and copper is heated ,then |
| Answer» <html><body><p>it <a href="https://interviewquestions.tuteehub.com/tag/gets-1005751" style="font-weight:bold;" target="_blank" title="Click to know more about GETS">GETS</a> twisted<br/>it does not bend<br/>it bends<br/>with <a href="https://interviewquestions.tuteehub.com/tag/copper-933790" style="font-weight:bold;" target="_blank" title="Click to know more about COPPER">COPPER</a> <a href="https://interviewquestions.tuteehub.com/tag/strip-1229599" style="font-weight:bold;" target="_blank" title="Click to know more about STRIP">STRIP</a> on the <a href="https://interviewquestions.tuteehub.com/tag/convex-933348" style="font-weight:bold;" target="_blank" title="Click to know more about CONVEX">CONVEX</a> side</p>Answer :A</body></html> | |
| 39902. |
A police caar moving at 22 m .s^(-1)chases a motor cycle . The man in the car sounds his horn at 170 Hz while both of them move towards a stationary siren of frequency 165 Hz . Calculate the speed of motor cycle if the motor cyclist does not listen any beat . |
| Answer» <html><body><p><br/></p><a href="https://interviewquestions.tuteehub.com/tag/solution-25781" style="font-weight:bold;" target="_blank" title="Click to know more about SOLUTION">SOLUTION</a> :N/A</body></html> | |
| 39903. |
Each of two men A and B is carrying a source of sound of frequency n . If A approaches B with a velocity u how many beats per second will be heard by B ? (Velocity of sound = c) |
| Answer» <html><body><p></p>Solution :Apparent frequency , n. ` (<a href="https://interviewquestions.tuteehub.com/tag/c-7168" style="font-weight:bold;" target="_blank" title="Click to know more about C">C</a> + u_(0))/(c- u_(5)) xx n`<br/>The distance between A and B is dacreasing . So , the velocity of the listener ` u_(0) ` and that of the source ` u_(s) ` , are both positive<br/>When B is the listener, velocity of the listener, ` u_(0)=0 `,<br/> Velocity of the source ` A , u_(s)= u `<br/> So, ` n_(8) = (c) /(c-u) xxn `<br/> Evidently, ` n_(8) <a href="https://interviewquestions.tuteehub.com/tag/gt-1013864" style="font-weight:bold;" target="_blank" title="Click to know more about GT">GT</a> n`<br/> ` therefore ` Number of beats <a href="https://interviewquestions.tuteehub.com/tag/per-590802" style="font-weight:bold;" target="_blank" title="Click to know more about PER">PER</a> <a href="https://interviewquestions.tuteehub.com/tag/second-1197322" style="font-weight:bold;" target="_blank" title="Click to know more about SECOND">SECOND</a><br/> ` therefore ` Number of beats per second<br/> ` n_(g) - n = ((c)/(c- u) -1)xx n = (u)/(c-u) n`</body></html> | |
| 39904. |
The total mechanical energy of a harmonic oscillator of amplitude 1m and force 200 N"/"m is 150 J. Then |
| Answer» <html><body><p>the minimum <a href="https://interviewquestions.tuteehub.com/tag/pe-590719" style="font-weight:bold;" target="_blank" title="Click to know more about PE">PE</a> is zero<br/>The maximum PE is <a href="https://interviewquestions.tuteehub.com/tag/100-263808" style="font-weight:bold;" target="_blank" title="Click to know more about 100">100</a> J<br/>the minimum PE <a href="https://interviewquestions.tuteehub.com/tag/50-322056" style="font-weight:bold;" target="_blank" title="Click to know more about 50">50</a> J<br/>the maximum PE is 50 J</p>Answer :C</body></html> | |
| 39905. |
Each of two men A and B is carrying a source of sound of frequency n . If A approaches B with a velocity u how many beats per sound will be heard by A and B |
| Answer» <html><body><p></p>Solution :<a href="https://interviewquestions.tuteehub.com/tag/apparent-363672" style="font-weight:bold;" target="_blank" title="Click to know more about APPARENT">APPARENT</a> frequency , n. ` (<a href="https://interviewquestions.tuteehub.com/tag/c-7168" style="font-weight:bold;" target="_blank" title="Click to know more about C">C</a> + u_(0))/(c- u_(5)) <a href="https://interviewquestions.tuteehub.com/tag/xx-747671" style="font-weight:bold;" target="_blank" title="Click to know more about XX">XX</a> n`<br/>The distance between A and B is dacreasing . So , the velocity of the listener ` u_(0) ` and that of the source ` u_(s) ` , are both positive<br/>When A is the listener, velocity of the listener, ` u_(0) = u` , <br/> Velocity of the source ` B , u_(s) = 0 `<br/> So, ` n_(A) = (c + u)/(c) xx n `<br/> Evidently , ` n_(A) <a href="https://interviewquestions.tuteehub.com/tag/gt-1013864" style="font-weight:bold;" target="_blank" title="Click to know more about GT">GT</a> n`<br/> ` thereforeNumber of beats per socond<br/> ` = n_(A) - n = ((c + u)/(c) - 1) xx n = u/c n ` .</body></html> | |
| 39906. |
If a body coated black at 600K surrounded by atmosphere at 300 K has cooling rate r_(0), the same body at 900 K, surrounded by the same atmosphere, will have cooling rate equal to |
| Answer» <html><body><p>`16/3 r_(0)` <br/>`8/16 r_(0)` <br/>`16 r_(0)` <br/>`4 r_(0)` </p>Solution :Cooling <a href="https://interviewquestions.tuteehub.com/tag/rate-1177476" style="font-weight:bold;" target="_blank" title="Click to know more about RATE">RATE</a> `<a href="https://interviewquestions.tuteehub.com/tag/alpha-858274" style="font-weight:bold;" target="_blank" title="Click to know more about ALPHA">ALPHA</a> T^(4)-T_(0)^(4)` <br/> `r = {((<a href="https://interviewquestions.tuteehub.com/tag/900-341675" style="font-weight:bold;" target="_blank" title="Click to know more about 900">900</a>)^(4)-(300)^(4))/((600)^(4)-(300)^(4))}r_(0) = 16/3r_(0)`</body></html> | |
| 39907. |
A car of weight W is on an inclined road that rises by 100m over a distance if 1 k and applies a constant frictional force (W)/(20)on the car. While moving uphill on the road at a speed of 10 ms^(-1), the car needs power P. If it needs power (P)/(2) while moving downhill at speed v then value of v is |
| Answer» <html><body><p>`20 ms^(-1)`<br/>`5 ms^(-1)`<br/>`<a href="https://interviewquestions.tuteehub.com/tag/15-274069" style="font-weight:bold;" target="_blank" title="Click to know more about 15">15</a> ms^(-1)`<br/>`<a href="https://interviewquestions.tuteehub.com/tag/10-261113" style="font-weight:bold;" target="_blank" title="Click to know more about 10">10</a> ms^(-1)`</p><a href="https://interviewquestions.tuteehub.com/tag/answer-15557" style="font-weight:bold;" target="_blank" title="Click to know more about ANSWER">ANSWER</a> :<a href="https://interviewquestions.tuteehub.com/tag/c-7168" style="font-weight:bold;" target="_blank" title="Click to know more about C">C</a></body></html> | |
| 39908. |
The displacement-time relation for a particle can be expressed as, y = 5[cos^2 (4pit) - sin^2 (4 pi t)] . The relation shows that: |
| Answer» <html><body><p>The <a href="https://interviewquestions.tuteehub.com/tag/particle-1147478" style="font-weight:bold;" target="_blank" title="Click to know more about PARTICLE">PARTICLE</a> is executing a <a href="https://interviewquestions.tuteehub.com/tag/shm-630759" style="font-weight:bold;" target="_blank" title="Click to know more about SHM">SHM</a> with amplitude 5 m <br/>The particle is executing a SHM with a frequency 4 times that of a second's pendulum <br/>The particle is executing a SHM and the velocity in its mean <a href="https://interviewquestions.tuteehub.com/tag/position-1159826" style="font-weight:bold;" target="_blank" title="Click to know more about POSITION">POSITION</a> is (<a href="https://interviewquestions.tuteehub.com/tag/40-314386" style="font-weight:bold;" target="_blank" title="Click to know more about 40">40</a>)m/s<br/>the particle is not executing a SHM at all </p>Answer :A::<a href="https://interviewquestions.tuteehub.com/tag/c-7168" style="font-weight:bold;" target="_blank" title="Click to know more about C">C</a></body></html> | |
| 39909. |
' It is more important to have beauty in the equations of physics then to have them agree with experiments''. The great British physicist P . A. M. Dirca held this view. Criticize this statement. Look out for some equations and results in this book which strike you as beautiful. |
| Answer» <html><body><p></p>Solution :The statement of great Dritish Physicist P. A. M. Dirac is partially ture. For example, `F = m a , <a href="https://interviewquestions.tuteehub.com/tag/e-444102" style="font-weight:bold;" target="_blank" title="Click to know more about E">E</a>= mc^2` are <br/> some of the simple and beautiful equations of physics which have universal application. <br/> However, this is not the case always. The equations involved in general <a href="https://interviewquestions.tuteehub.com/tag/theory-706806" style="font-weight:bold;" target="_blank" title="Click to know more about THEORY">THEORY</a> of <a href="https://interviewquestions.tuteehub.com/tag/relativity-1183718" style="font-weight:bold;" target="_blank" title="Click to know more about RELATIVITY">RELATIVITY</a> and some of the <br/> latest works of higher Physics are neither simple nor beautiful. They are rather difficult to <a href="https://interviewquestions.tuteehub.com/tag/understand-720010" style="font-weight:bold;" target="_blank" title="Click to know more about UNDERSTAND">UNDERSTAND</a>.</body></html> | |
| 39910. |
A stone is thrown upwards with a speed y from the top of a tower. It reaches the ground with a velocity 3v. What is the height of the tower? |
| Answer» <html><body><p></p>Solution :From equation of motion <br/>v.`= u + at `….(1) <br/> `h = ut + 1/<a href="https://interviewquestions.tuteehub.com/tag/2-283658" style="font-weight:bold;" target="_blank" title="Click to know more about 2">2</a> at^2` <br/> ` v.= av, u = v , a = + g` <br/>using <a href="https://interviewquestions.tuteehub.com/tag/eqn-973463" style="font-weight:bold;" target="_blank" title="Click to know more about EQN">EQN</a> (1) <br/> <a href="https://interviewquestions.tuteehub.com/tag/3v-310794" style="font-weight:bold;" target="_blank" title="Click to know more about 3V">3V</a> = v + gt `rArr` 3v - v = gt <br/> ` t=(2v)/(g)` <br/> substituting.t. <a href="https://interviewquestions.tuteehub.com/tag/value-1442530" style="font-weight:bold;" target="_blank" title="Click to know more about VALUE">VALUE</a> in eqn (2) <br/> `h = v ( (2v)/(g) ) + 1/2 g ( (2v)/(g) )^2 = (2v^2)/(g) + 1/2 g ( (2v)/(g) )^2` <br/> ` h = (2v^2)/(g) + (2v^2)/(g)` <br/>` = (4v^2)/(g) "" g = <a href="https://interviewquestions.tuteehub.com/tag/10-261113" style="font-weight:bold;" target="_blank" title="Click to know more about 10">10</a> ms^(-2)` <br/> ` = (4v^2)/(10) , h = (2v^2)/(5)`</body></html> | |
| 39911. |
Obtain the equation of frequency of stationary wave propuced in open pipe and show that all harmonics are possible in it. |
| Answer» <html><body><p></p>Solution :In open pipe antiodes are produced at both ends and <a href="https://interviewquestions.tuteehub.com/tag/consecutive-929616" style="font-weight:bold;" target="_blank" title="Click to know more about CONSECUTIVE">CONSECUTIVE</a> antinodes are obtained at <br/> `(lamda)/(2), lamda, (3lamda)/(2), …, (n lamda)/(2)` where,` n = <a href="https://interviewquestions.tuteehub.com/tag/1-256655" style="font-weight:bold;" target="_blank" title="Click to know more about 1">1</a>,2,3,…` <br/> If wavelength is `lamda` for open pipe of length L, then stationary waves will only be produced if `L = ( n lamda )/(2)` <br/> `therefore lamda _(n) = (2L)/(n)` <br/> Frequency of stationlary waves in open pipe, <br/> `(v)/( v _(n )) = (2L)/(n) [ because v = lamda v implies lamda = (v)/(v ) ]` <br/> `therefore v _(n) = (nv)/(2L)...(1)` where v is wave <a href="https://interviewquestions.tuteehub.com/tag/speed-1221896" style="font-weight:bold;" target="_blank" title="Click to know more about SPEED">SPEED</a>. <br/>First 4 harmonics are shown for stationary waves in open pipe in figure, <br/> <img src="https://doubtnut-static.s.llnwi.net/static/physics_images/KPK_AIO_PHY_XI_P2_C15_E01_036_S01.png" width="80%"/> <br/> If wp place `n =1 `in equatin (1), then fundamental or first harmonic is obtained, <br/> `therefore v _(2) = (v)/(2L)` <br/> Second harmonic is obtained by putting `n =2` in equation (1), <br/> `therefore v _(2) = (2v )/( 2L) = v/L OR 2 ((v )/(2L)) = 2v _(1)` <br/> Accordingly by putting `n = 3,4 ,...,n` in equation (1), <a href="https://interviewquestions.tuteehub.com/tag/third-1414358" style="font-weight:bold;" target="_blank" title="Click to know more about THIRD">THIRD</a>, fourth, `...n ^(th)` harmonic can be obtained and corresponding (n-1) overtones are obtained.</body></html> | |
| 39912. |
The Moon Io orbits jupiter once in 1.769 days. The orbital radius of the Moon Io is 421700 Km. Caculate the mass of jupiter? |
| Answer» <html><body><p></p>Solution :Kepler.s <a href="https://interviewquestions.tuteehub.com/tag/third-1414358" style="font-weight:bold;" target="_blank" title="Click to know more about THIRD">THIRD</a> law is <a href="https://interviewquestions.tuteehub.com/tag/used-2318798" style="font-weight:bold;" target="_blank" title="Click to know more about USED">USED</a> to find the mass of the planet<br/> `T^(2) = (4pi^(2))/(GM) (R+h)^(2)`<br/> ` M = (4pi^(2))/(GT^(2)) (R+h)^(2)(<a href="https://interviewquestions.tuteehub.com/tag/4-311707" style="font-weight:bold;" target="_blank" title="Click to know more about 4">4</a>(3.14)^(2) xx (421700 xx10^(3))^(2))/(6.67 xx10^(11) xx (1.769xx86400)^(2))`<br/>` = (39.4384 xx 7.499128631xx10^(<a href="https://interviewquestions.tuteehub.com/tag/25-296426" style="font-weight:bold;" target="_blank" title="Click to know more about 25">25</a>))/(6.67xx10^(-11) xx 2.336055469 xx10^(10))`<br/> ` = (295.7536 xx10^(25))/(1.5581 ) = 189.8169 xx10^(25)`<br/> `M = 1.898 xx10^(<a href="https://interviewquestions.tuteehub.com/tag/27-298706" style="font-weight:bold;" target="_blank" title="Click to know more about 27">27</a>)` kg</body></html> | |
| 39913. |
A particle of mass m is moving in a circular path of constant radius r such that its centripetal acceleration a is varying with time t as a = k^(2)rt^(2) where k is a constant. What is the power delivered to the particle by the forces acting on it. |
| Answer» <html><body><p><<a href="https://interviewquestions.tuteehub.com/tag/p-588962" style="font-weight:bold;" target="_blank" title="Click to know more about P">P</a>></p>Solution :`Asa_(c)=(v^(2)//<a href="https://interviewquestions.tuteehub.com/tag/r-611811" style="font-weight:bold;" target="_blank" title="Click to know more about R">R</a>)so(v^(2)//r)=k^(2)rt^(2)` <br/> <a href="https://interviewquestions.tuteehub.com/tag/kinetic-533291" style="font-weight:bold;" target="_blank" title="Click to know more about KINETIC">KINETIC</a> energy `K = (1)/(2) mv^(2) = (1)/(2) mk^(2)r^(2)t^(2)` <br/> Now by work - Enetgy Theorem <br/> `W=DeltaK=(1)/(2)mk^(2)r^(2)t^(2)-0rArrP=(dw)/(dt)` <br/> `<a href="https://interviewquestions.tuteehub.com/tag/rarr-1175461" style="font-weight:bold;" target="_blank" title="Click to know more about RARR">RARR</a> P = (d)/(dt) = (1)/(2) mk^(2)r^(2)t^(2) =mk^(2)r^(2)t`</body></html> | |
| 39914. |
What is coefficient of static friction? |
| Answer» <html><body><p></p><a href="https://interviewquestions.tuteehub.com/tag/solution-25781" style="font-weight:bold;" target="_blank" title="Click to know more about SOLUTION">SOLUTION</a> :Thecoefficientof <a href="https://interviewquestions.tuteehub.com/tag/staticfriction-2281518" style="font-weight:bold;" target="_blank" title="Click to know more about STATICFRICTION">STATICFRICTION</a> is equaltotangentofthe angleof <a href="https://interviewquestions.tuteehub.com/tag/friction-21545" style="font-weight:bold;" target="_blank" title="Click to know more about FRICTION">FRICTION</a></body></html> | |
| 39915. |
A wire AB of radius 0.3 mm and length 300 cm is attached to a fixed support at its ends A and it hangs vertically. The wire carries a load 39.2N attached to its mid-point and also another load of 39.2N at its lower end B. IF Y for the material of the wire is 2 times 10^12 dyn.cm^-2, find the elongation of the end B. |
| Answer» <html><body><p><br/></p><a href="https://interviewquestions.tuteehub.com/tag/answer-15557" style="font-weight:bold;" target="_blank" title="Click to know more about ANSWER">ANSWER</a> :`0.312 <a href="https://interviewquestions.tuteehub.com/tag/times-1420471" style="font-weight:bold;" target="_blank" title="Click to know more about TIMES">TIMES</a> 10^-3 <a href="https://interviewquestions.tuteehub.com/tag/cm-919986" style="font-weight:bold;" target="_blank" title="Click to know more about CM">CM</a>`</body></html> | |
| 39916. |
In the above diagram m_2 gt gtm_1the acceleration of the cart is xg. Then 'x' is |
| Answer» <html><body><p><br/></p><a href="https://interviewquestions.tuteehub.com/tag/answer-15557" style="font-weight:bold;" target="_blank" title="Click to know more about ANSWER">ANSWER</a> :<a href="https://interviewquestions.tuteehub.com/tag/2-283658" style="font-weight:bold;" target="_blank" title="Click to know more about 2">2</a></body></html> | |
| 39917. |
In the relation dQ=dU+dW, the quantity which remains the same for all process is |
| Answer» <html><body><p>`<a href="https://interviewquestions.tuteehub.com/tag/dq-959213" style="font-weight:bold;" target="_blank" title="Click to know more about DQ">DQ</a>`<br/>`aW`<br/>`<a href="https://interviewquestions.tuteehub.com/tag/du-433459" style="font-weight:bold;" target="_blank" title="Click to know more about DU">DU</a>`<br/>all of the above</p>Solution :Steeper , an isothermal curve.</body></html> | |
| 39918. |
In a game of tug-of-war, if both the parties exert a force of T dyn from either side, what will be the tension in the rope? |
| Answer» <html><body><p></p><a href="https://interviewquestions.tuteehub.com/tag/solution-25781" style="font-weight:bold;" target="_blank" title="Click to know more about SOLUTION">SOLUTION</a> :<a href="https://interviewquestions.tuteehub.com/tag/tension-1241727" style="font-weight:bold;" target="_blank" title="Click to know more about TENSION">TENSION</a> in the <a href="https://interviewquestions.tuteehub.com/tag/rope-1191046" style="font-weight:bold;" target="_blank" title="Click to know more about ROPE">ROPE</a> will be T <a href="https://interviewquestions.tuteehub.com/tag/dyn-2596635" style="font-weight:bold;" target="_blank" title="Click to know more about DYN">DYN</a>.</body></html> | |
| 39919. |
Jumping on a cementedfloorreceives more injuries than on the sand given reason |
| Answer» <html><body><p></p><a href="https://interviewquestions.tuteehub.com/tag/solution-25781" style="font-weight:bold;" target="_blank" title="Click to know more about SOLUTION">SOLUTION</a> :Jumpingon aconcretecemented floorismoredangerousthanjumpingon thesand.Sandbringsthe <a href="https://interviewquestions.tuteehub.com/tag/bodyto-2478278" style="font-weight:bold;" target="_blank" title="Click to know more about BODYTO">BODYTO</a> restslowlythanthe concretefloo, so that <a href="https://interviewquestions.tuteehub.com/tag/theaverage-706332" style="font-weight:bold;" target="_blank" title="Click to know more about THEAVERAGE">THEAVERAGE</a> forceexperiencedby the <a href="https://interviewquestions.tuteehub.com/tag/body-900196" style="font-weight:bold;" target="_blank" title="Click to know more about BODY">BODY</a> will belesser.</body></html> | |
| 39920. |
The mass of an object is (225 +- 0.05) gm calculate percentage error in measurement. |
| Answer» <html><body><p></p>Solution :mass `m=<a href="https://interviewquestions.tuteehub.com/tag/225-294624" style="font-weight:bold;" target="_blank" title="Click to know more about 225">225</a>+-0.05` <br/> Percentage <a href="https://interviewquestions.tuteehub.com/tag/error-25548" style="font-weight:bold;" target="_blank" title="Click to know more about ERROR">ERROR</a> in <br/> mass `=(<a href="https://interviewquestions.tuteehub.com/tag/deltam-2570666" style="font-weight:bold;" target="_blank" title="Click to know more about DELTAM">DELTAM</a>)/(m)<a href="https://interviewquestions.tuteehub.com/tag/xx100-3292680" style="font-weight:bold;" target="_blank" title="Click to know more about XX100">XX100</a>%` <br/> `=(0.05)/(225)xx100%=0.022%`</body></html> | |
| 39921. |
A man pushes a block of 30 kg along a level floor of constant speed with a force directed at 45^(@) below the horizontal. If the ceofficient of friction is 0.2. Then match the following from column-I and Column -II |
| Answer» <html><body><p><br/></p><a href="https://interviewquestions.tuteehub.com/tag/answer-15557" style="font-weight:bold;" target="_blank" title="Click to know more about ANSWER">ANSWER</a> :A::<a href="https://interviewquestions.tuteehub.com/tag/b-387190" style="font-weight:bold;" target="_blank" title="Click to know more about B">B</a>::<a href="https://interviewquestions.tuteehub.com/tag/c-7168" style="font-weight:bold;" target="_blank" title="Click to know more about C">C</a>::D</body></html> | |
| 39922. |
The rise of water into a capillary tube placed vertically is h. When it is tilted through an angle, the vertical height of water raised will be: |
| Answer» <html><body><p>`<a href="https://interviewquestions.tuteehub.com/tag/gth-469575" style="font-weight:bold;" target="_blank" title="Click to know more about GTH">GTH</a>`<br/>`<a href="https://interviewquestions.tuteehub.com/tag/lth-3715295" style="font-weight:bold;" target="_blank" title="Click to know more about LTH">LTH</a>`<br/>`h`<br/>`<a href="https://interviewquestions.tuteehub.com/tag/0-251616" style="font-weight:bold;" target="_blank" title="Click to know more about 0">0</a>`</p>Answer :<a href="https://interviewquestions.tuteehub.com/tag/c-7168" style="font-weight:bold;" target="_blank" title="Click to know more about C">C</a></body></html> | |
| 39923. |
Temperature can be expressed as derived quantity in terms of any of the following |
| Answer» <html><body><p><a href="https://interviewquestions.tuteehub.com/tag/length-1071524" style="font-weight:bold;" target="_blank" title="Click to know more about LENGTH">LENGTH</a> and <a href="https://interviewquestions.tuteehub.com/tag/mass-1088425" style="font-weight:bold;" target="_blank" title="Click to know more about MASS">MASS</a><br/>Mass and time<br/>Length, mass and time<br/>In <a href="https://interviewquestions.tuteehub.com/tag/terms-1242559" style="font-weight:bold;" target="_blank" title="Click to know more about TERMS">TERMS</a> of <a href="https://interviewquestions.tuteehub.com/tag/none-580659" style="font-weight:bold;" target="_blank" title="Click to know more about NONE">NONE</a> of these</p>Answer :D</body></html> | |
| 39924. |
A particle executes SHM of period T and amplitude l along a rod AB of length 2l. The rod AB itself executes SHM of the same period and amplitude in a direction perpendicular to its length. Initially, both the particle and the rod are in their mean position. The path traced out by the particle will be........... |
| Answer» <html><body><p>a circle of radius <a href="https://interviewquestions.tuteehub.com/tag/l-535906" style="font-weight:bold;" target="_blank" title="Click to know more about L">L</a><br/>a straight line inclined at `(pi)/(4)` to the rod <br/>an ellipse<br/>a figure of eight</p>Solution :<a href="https://interviewquestions.tuteehub.com/tag/let-11597" style="font-weight:bold;" target="_blank" title="Click to know more about LET">LET</a> the <a href="https://interviewquestions.tuteehub.com/tag/simple-1208262" style="font-weight:bold;" target="_blank" title="Click to know more about SIMPLE">SIMPLE</a> harmonic equation for the particle be `x= l sin omega t"""………."(1)` <br/> The equation of motion of rod AB, <br/> `y= l cos (omega t + <a href="https://interviewquestions.tuteehub.com/tag/phi-599602" style="font-weight:bold;" target="_blank" title="Click to know more about PHI">PHI</a>)` <br/> where rod executes angular frequency (periodic time) in y-direction with amplitude of particle. <br/> For both, at mean position `t=0" and "x= y=0` then `phi = (pi)/(2)`. <br/> `therefore y= l cos (omega t+(pi)/(2))= -l sin omega t"..........."(2)` <br/> Frqom equation (1) and (2), `y= -x`, <br/> which is the equation to a straight line at angle `(pi)/(4)` to the rod.</body></html> | |
| 39925. |
Two masses m_(1) = 4.8 kg and m_(2) = 5 kg tied to a string are hanging over a light frictionless pully. What is the acceleration of masses when they are free to move ? |
| Answer» <html><body><p>0.<a href="https://interviewquestions.tuteehub.com/tag/2-283658" style="font-weight:bold;" target="_blank" title="Click to know more about 2">2</a> `m//s^(2)`<br/>9.8 `m//s^(2)`<br/><a href="https://interviewquestions.tuteehub.com/tag/5-319454" style="font-weight:bold;" target="_blank" title="Click to know more about 5">5</a> `m//s^(2)`<br/>4.8 `m//s^(2)`</p><a href="https://interviewquestions.tuteehub.com/tag/solution-25781" style="font-weight:bold;" target="_blank" title="Click to know more about SOLUTION">SOLUTION</a> :Supposethe accelerationof compositesystemis a<br/> `m_(2) g - T =m_(2)a ` and <br/> Addingthesetwoequations <br/> `(m_(2)-m_(1)) g =(m_(1) =m_(2)) a` <br/> `a= ((m_(2) - m_(1))/(m_(1) + m_(2))) g ` <br/> <img src="https://doubtnut-static.s.llnwi.net/static/physics_images/KPK_AIO_PHY_XI_P1_C05_E05_061_S01.png" width="80%"/> <br/> `=((5-4.8)/( 5+4.8)) 9.8` <br/> `=(0.2)/(9.8) xx 9.8` <br/> `a= 0.2 m//s^(2)`</body></html> | |
| 39926. |
In a clockwise system |
| Answer» <html><body><p>`hatjxxhatj=1`<br/>`<a href="https://interviewquestions.tuteehub.com/tag/hatk-2693615" style="font-weight:bold;" target="_blank" title="Click to know more about HATK">HATK</a>*<a href="https://interviewquestions.tuteehub.com/tag/hati-2693493" style="font-weight:bold;" target="_blank" title="Click to know more about HATI">HATI</a>=1`<br/>`hatjxxhatk=hati`<br/>`hati*hati=0`</p><a href="https://interviewquestions.tuteehub.com/tag/answer-15557" style="font-weight:bold;" target="_blank" title="Click to know more about ANSWER">ANSWER</a> :<a href="https://interviewquestions.tuteehub.com/tag/c-7168" style="font-weight:bold;" target="_blank" title="Click to know more about C">C</a></body></html> | |
| 39927. |
A block of ice of mass 50kg is sliding on a horizontal plane. It starts with speed 5ms^(-1) and stop 3 after moving through some distance. The mass of ice that has melted due to friction between the block and the suface is (assuming that no energy is lost nad the surface is (assuming that no energy is lost and latent heat of fustion of ice is 80 calg^(-1)) |
| Answer» <html><body><p>2.86 <a href="https://interviewquestions.tuteehub.com/tag/g-1003017" style="font-weight:bold;" target="_blank" title="Click to know more about G">G</a><br/>3.86 g<br/>0.86 g<br/>1.86 g</p>Solution :d) Given, m = 50kg, v=`5ms^(-1)`, L = 80 `calg^(-1)` <br/> <a href="https://interviewquestions.tuteehub.com/tag/j-520843" style="font-weight:bold;" target="_blank" title="Click to know more about J">J</a>=4.2J `cal^(-1)` and m=? <br/> Heat lost i.e., `Q_(1)` = workd <a href="https://interviewquestions.tuteehub.com/tag/done-2591742" style="font-weight:bold;" target="_blank" title="Click to know more about DONE">DONE</a>, K = Kinetic energy <br/> i.e., `1/2mv^(2)= 1/2 xx50 xx5^(2)`=625 J <br/> and heat <a href="https://interviewquestions.tuteehub.com/tag/gained-2665852" style="font-weight:bold;" target="_blank" title="Click to know more about GAINED">GAINED</a> i.e., `Q_(2)=m^(')xxL = 80 xxm^(')xx4.2` <br/> `<a href="https://interviewquestions.tuteehub.com/tag/therefore-706901" style="font-weight:bold;" target="_blank" title="Click to know more about THEREFORE">THEREFORE</a>` `Q_(1)=Q_(2)` <br/> 625 = `m^(') xx 8 xx 42 rArr m^(')=1.86`g</body></html> | |
| 39928. |
If a particle is executing SHM on a straight line. A and B are two points at which its velocity is zero. It passes through a certain point P(AP lt PB) at successive intervals of 0.5 sec" and "1.5 sec with a speed of 3 m"/"s. The maximum speed of the particle is |
| Answer» <html><body><p>`<a href="https://interviewquestions.tuteehub.com/tag/3-301577" style="font-weight:bold;" target="_blank" title="Click to know more about 3">3</a> m"/"s`<br/>`3sqrt(<a href="https://interviewquestions.tuteehub.com/tag/2-283658" style="font-weight:bold;" target="_blank" title="Click to know more about 2">2</a>) m"/"s`<br/>`3sqrt(3) m"/"s`<br/>`<a href="https://interviewquestions.tuteehub.com/tag/6-327005" style="font-weight:bold;" target="_blank" title="Click to know more about 6">6</a> m"/"s`</p><a href="https://interviewquestions.tuteehub.com/tag/answer-15557" style="font-weight:bold;" target="_blank" title="Click to know more about ANSWER">ANSWER</a> :<a href="https://interviewquestions.tuteehub.com/tag/b-387190" style="font-weight:bold;" target="_blank" title="Click to know more about B">B</a></body></html> | |
| 39929. |
A body is projected horizontally from a height of 78.4 m with a velocity10ms^(-1). Its velocity after 3 second is : (g=10ms^(-2))(Take direction of projection onvec(i) andvertically upward direction onvec(i) ). |
| Answer» <html><body><p>`<a href="https://interviewquestions.tuteehub.com/tag/10-261113" style="font-weight:bold;" target="_blank" title="Click to know more about 10">10</a> hat(i) - 30 hat(<a href="https://interviewquestions.tuteehub.com/tag/j-520843" style="font-weight:bold;" target="_blank" title="Click to know more about J">J</a>)` <br/>`10 hat(i) + 30 hat(j)`<br/>`<a href="https://interviewquestions.tuteehub.com/tag/20-287209" style="font-weight:bold;" target="_blank" title="Click to know more about 20">20</a> hat(i) - 30 hat(j)`<br/>`10 hat(i) + 10 sqrt(3)hat(j)`</p>Answer :A</body></html> | |
| 39930. |
Solve the following and express the result to an appropriate number of significant figures. (ii) Subtract 63.54 kg from 187.2 kg |
| Answer» <html><body><p></p><a href="https://interviewquestions.tuteehub.com/tag/solution-25781" style="font-weight:bold;" target="_blank" title="Click to know more about SOLUTION">SOLUTION</a> :`187.2kg-63.54kg=123.66kg` <br/> = 123.7 kg (<a href="https://interviewquestions.tuteehub.com/tag/rounded-2999253" style="font-weight:bold;" target="_blank" title="Click to know more about ROUNDED">ROUNDED</a> off of <a href="https://interviewquestions.tuteehub.com/tag/first-461760" style="font-weight:bold;" target="_blank" title="Click to know more about FIRST">FIRST</a> decimal <a href="https://interviewquestions.tuteehub.com/tag/place-1155224" style="font-weight:bold;" target="_blank" title="Click to know more about PLACE">PLACE</a>)</body></html> | |
| 39931. |
What type of strain is produced when a spring is stretched? |
| Answer» <html><body><p></p>Solution :When a spring is <a href="https://interviewquestions.tuteehub.com/tag/stretched-7711564" style="font-weight:bold;" target="_blank" title="Click to know more about STRETCHED">STRETCHED</a> there is neither <a href="https://interviewquestions.tuteehub.com/tag/change-913808" style="font-weight:bold;" target="_blank" title="Click to know more about CHANGE">CHANGE</a> in the length of the wire forming the coil nor change in its <a href="https://interviewquestions.tuteehub.com/tag/volume-728707" style="font-weight:bold;" target="_blank" title="Click to know more about VOLUME">VOLUME</a>. The change <a href="https://interviewquestions.tuteehub.com/tag/takes-1238575" style="font-weight:bold;" target="_blank" title="Click to know more about TAKES">TAKES</a> <a href="https://interviewquestions.tuteehub.com/tag/place-1155224" style="font-weight:bold;" target="_blank" title="Click to know more about PLACE">PLACE</a> in the shape of coil producing shear strain.</body></html> | |
| 39932. |
A block slides down an inclined plane inclination theta with constant velocity. It is then projected up the same plane with an initial velocity mu. How far up the incline will it remove before coming to rest? |
| Answer» <html><body><p> </p><a href="https://interviewquestions.tuteehub.com/tag/solution-25781" style="font-weight:bold;" target="_blank" title="Click to know more about SOLUTION">SOLUTION</a> :`<a href="https://interviewquestions.tuteehub.com/tag/mu-566056" style="font-weight:bold;" target="_blank" title="Click to know more about MU">MU</a>^(<a href="https://interviewquestions.tuteehub.com/tag/2-283658" style="font-weight:bold;" target="_blank" title="Click to know more about 2">2</a>)/(4gsintheta)`</body></html> | |
| 39933. |
A uniform chain of length L is placed on a smooth table of height h (hgtL) with a lenth I hanging from the edge of the table. The chain begins to slide done the table. When the end of the chain is about to level the edge of the table its velocity is |
| Answer» <html><body><p>`<a href="https://interviewquestions.tuteehub.com/tag/sqrt-1223129" style="font-weight:bold;" target="_blank" title="Click to know more about SQRT">SQRT</a>((t(<a href="https://interviewquestions.tuteehub.com/tag/l-535906" style="font-weight:bold;" target="_blank" title="Click to know more about L">L</a>+l))/L)`<br/>`sqrt((<a href="https://interviewquestions.tuteehub.com/tag/g-1003017" style="font-weight:bold;" target="_blank" title="Click to know more about G">G</a>(L-l))/L)`<br/>`sqrt((g(L^(2)+l^(2)))/L)`<br/>`sqrt(2g(L-l))`</p>Answer :C</body></html> | |
| 39934. |
A man of mass 80kg carrying a load of 20kg walks up a stair case in 20s. If the number of steps is 40 and width and height of each step are 20cm and 15cm respectively. The efficiency of the man is |
| Answer» <html><body><p>0.2<br/>0.25<br/>0.4<br/>0.5</p>Answer :<a href="https://interviewquestions.tuteehub.com/tag/b-387190" style="font-weight:bold;" target="_blank" title="Click to know more about B">B</a></body></html> | |
| 39935. |
The displacement x of a particle varies with time according to the relation x = a/b (1-e^(-bt)).Then |
| Answer» <html><body><p>At t = <a href="https://interviewquestions.tuteehub.com/tag/1-256655" style="font-weight:bold;" target="_blank" title="Click to know more about 1">1</a>/6, the <a href="https://interviewquestions.tuteehub.com/tag/displacement-956081" style="font-weight:bold;" target="_blank" title="Click to know more about DISPLACEMENT">DISPLACEMENT</a> of the particle in nearly (1/3) (a/b) <br/> The velocity and acceleration of the particle at t = 0 are a and -<a href="https://interviewquestions.tuteehub.com/tag/ab-360636" style="font-weight:bold;" target="_blank" title="Click to know more about AB">AB</a> respectively<br/> Both 1 and 2 <br/> At t = 1/6, the displacement of the particle is (3/5) (a/b)</p><a href="https://interviewquestions.tuteehub.com/tag/answer-15557" style="font-weight:bold;" target="_blank" title="Click to know more about ANSWER">ANSWER</a> :B</body></html> | |
| 39936. |
When 20 J of work was done on a gas, 40J of heat energy was released. If the initial internal energyof the gas was 70J, what is the final internal energy? |
| Answer» <html><body><p><a href="https://interviewquestions.tuteehub.com/tag/50-322056" style="font-weight:bold;" target="_blank" title="Click to know more about 50">50</a> <a href="https://interviewquestions.tuteehub.com/tag/j-520843" style="font-weight:bold;" target="_blank" title="Click to know more about J">J</a> <br/><a href="https://interviewquestions.tuteehub.com/tag/60-328817" style="font-weight:bold;" target="_blank" title="Click to know more about 60">60</a> J <br/><a href="https://interviewquestions.tuteehub.com/tag/90-341351" style="font-weight:bold;" target="_blank" title="Click to know more about 90">90</a> J <br/><a href="https://interviewquestions.tuteehub.com/tag/110-268165" style="font-weight:bold;" target="_blank" title="Click to know more about 110">110</a> J</p>Answer :A</body></html> | |
| 39937. |
a thermodynamic system is taken from the state i to statef along the path iaf. It is found that the heat absorbed by the system is 40 cal and work done by the system is 16.19 cal. Along the path i bf, the heat absorbed is 35 cal. (a) Find the work done along the path i bf. (b) If W = - 10 cal for the curved return path fi, what is for this path ?(c) Take U_(b) = 20 cal, what is U _(f)? (d) If U _(b) = 20cal, what is for the process ib? |
| Answer» <html><body><p></p>Solution :`1 cal = 4.2` Joule <br/> First law of thermodynamilcs is `Delta U = Q - <a href="https://interviewquestions.tuteehub.com/tag/w-729065" style="font-weight:bold;" target="_blank" title="Click to know more about W">W</a> = U _(f ) - U _(i)` <br/> `Q = ( U _(f) - U _(f)) + W` <br/> ` Q = 40 cal = 40 xx 4.2` <br/> `= 168 J` <br/> `W = 16.19 cal` <br/> `= 16. 19 xx 4.2 = 68 J` <br/> `U _(f) - U _(i) = Q - W` <br/> `= 168 - 68 = 100 J` <br/> The <a href="https://interviewquestions.tuteehub.com/tag/change-913808" style="font-weight:bold;" target="_blank" title="Click to know more about CHANGE">CHANGE</a> in internal <a href="https://interviewquestions.tuteehub.com/tag/energy-15288" style="font-weight:bold;" target="_blank" title="Click to know more about ENERGY">ENERGY</a> between i and f is 100 J, and is independent of the path followed, because U is a point function and not a path function <br/> (a) Work done along the path i b f ` W = Q - Delta U` <br/> `Q = 35 xx 4.2=147 - 100 = 47 J` <br/> (b) For the path `fi, Q = ? W =- 10 cal =- <a href="https://interviewquestions.tuteehub.com/tag/42-316129" style="font-weight:bold;" target="_blank" title="Click to know more about 42">42</a> J` <br/> `Q = W + ( U_(i)U _(f)) = W - (U _(f) - U _(i)) =0 42 -100 = 0 142 J` <br/> (c ) `U _(i) = 8 cal = 8 xx 4.2 = 33.<a href="https://interviewquestions.tuteehub.com/tag/6-327005" style="font-weight:bold;" target="_blank" title="Click to know more about 6">6</a> J U _(f) = ?` <br/> `U _(f) - U _(i) = 100 J` <br/> (d) `U _(b) = 20 cal = 20 xx 33.6 = 133. 6 J` <br/> `U _(i) = 8 cal = 8 xx 4.2 = 33. 6 J` <br/> `DeltaU = U _(b) - U _(i) = 84 - 33. 6 = 50.4 J` <br/> The work done for the path ib is same as that for i b f so <br/> `W = 47 J `from (a) <br/> `Q = DeltaU + W = 50.4 + 47 = 97.4 J`</body></html> | |
| 39938. |
If two ships happen to move parallel and close to each other, they experience a force of pull forwards each other. Why? |
| Answer» <html><body><p></p><a href="https://interviewquestions.tuteehub.com/tag/solution-25781" style="font-weight:bold;" target="_blank" title="Click to know more about SOLUTION">SOLUTION</a> :When the <a href="https://interviewquestions.tuteehub.com/tag/ships-1205487" style="font-weight:bold;" target="_blank" title="Click to know more about SHIPS">SHIPS</a> come closer, the velocity of water between them <a href="https://interviewquestions.tuteehub.com/tag/increases-1040626" style="font-weight:bold;" target="_blank" title="Click to know more about INCREASES">INCREASES</a> (being very narrow gap) and the pressure decreases. But the pressure on theouter <a href="https://interviewquestions.tuteehub.com/tag/surface-1235573" style="font-weight:bold;" target="_blank" title="Click to know more about SURFACE">SURFACE</a> of each ship greater than this pressure between them. so the shops are pushed <a href="https://interviewquestions.tuteehub.com/tag/towards-7269729" style="font-weight:bold;" target="_blank" title="Click to know more about TOWARDS">TOWARDS</a> each other.</body></html> | |
| 39939. |
A stone is suspended by a thread from a rigid support. Another thread is attached at the bottom of the stone If the lower thred is pulled suddenly which thread - upperor lawer - does break ? If the lower thread is pulled slowly which thread - upper or lower - does break? |
| Answer» <html><body><p></p>Solution :Lower threadsince the applied force is not <a href="https://interviewquestions.tuteehub.com/tag/transmitted-7271515" style="font-weight:bold;" target="_blank" title="Click to know more about TRANSMITTED">TRANSMITTED</a> to the upper <a href="https://interviewquestions.tuteehub.com/tag/thread-1417557" style="font-weight:bold;" target="_blank" title="Click to know more about THREAD">THREAD</a> due to inertia . Upper thread <a href="https://interviewquestions.tuteehub.com/tag/since-644476" style="font-weight:bold;" target="_blank" title="Click to know more about SINCE">SINCE</a> the force applied will be transmitted to the upper thread and the total force on it is the sum of the applied force and the <a href="https://interviewquestions.tuteehub.com/tag/wieght-3278972" style="font-weight:bold;" target="_blank" title="Click to know more about WIEGHT">WIEGHT</a> of the stone .</body></html> | |
| 39940. |
How are metals used as semiconductors refined ? What is the principle of the method used like germanium, silicon etc. ? |
| Answer» <html><body><p></p><a href="https://interviewquestions.tuteehub.com/tag/solution-25781" style="font-weight:bold;" target="_blank" title="Click to know more about SOLUTION">SOLUTION</a> :<a href="https://interviewquestions.tuteehub.com/tag/used-2318798" style="font-weight:bold;" target="_blank" title="Click to know more about USED">USED</a> in.the <a href="https://interviewquestions.tuteehub.com/tag/construction-4021" style="font-weight:bold;" target="_blank" title="Click to know more about CONSTRUCTION">CONSTRUCTION</a> of <a href="https://interviewquestions.tuteehub.com/tag/centrifugal-415294" style="font-weight:bold;" target="_blank" title="Click to know more about CENTRIFUGAL">CENTRIFUGAL</a> <a href="https://interviewquestions.tuteehub.com/tag/governors-18829" style="font-weight:bold;" target="_blank" title="Click to know more about GOVERNORS">GOVERNORS</a>.</body></html> | |
| 39941. |
Three particles each of mass 100g are placed at the vertices of an equilateral triangle of side length 10cm. Find the moment of inertia of the system about an axis passing through the centroid of the triangle and perpendicular to its plane. |
| Answer» <html><body><p></p>Solution :`m=100g=100xx10^(-3)<a href="https://interviewquestions.tuteehub.com/tag/kg-1063886" style="font-weight:bold;" target="_blank" title="Click to know more about KG">KG</a>`, side `a=10cm=0.1m` <br/> Moment of <a href="https://interviewquestions.tuteehub.com/tag/inertia-1043176" style="font-weight:bold;" target="_blank" title="Click to know more about INERTIA">INERTIA</a> `I=3m^(<a href="https://interviewquestions.tuteehub.com/tag/2-283658" style="font-weight:bold;" target="_blank" title="Click to know more about 2">2</a>)` <br/> `=3xx100xx10^(-3)((10)/(sqrt(3)xx10^(-2))^(2)=10^(-3)kkgm^(2)`</body></html> | |
| 39942. |
1000 cm^(3) of argon at 27^(@)C is adiabatically compressed so that the temperature is 127^(@)C. Calculate the resulting volume. Given gamma = 5//3. |
| Answer» <html><body><p><br/></p><a href="https://interviewquestions.tuteehub.com/tag/answer-15557" style="font-weight:bold;" target="_blank" title="Click to know more about ANSWER">ANSWER</a> :`649.4 <a href="https://interviewquestions.tuteehub.com/tag/cm-919986" style="font-weight:bold;" target="_blank" title="Click to know more about CM">CM</a>^(<a href="https://interviewquestions.tuteehub.com/tag/3-301577" style="font-weight:bold;" target="_blank" title="Click to know more about 3">3</a>)`</body></html> | |
| 39943. |
Two satellites move along a circular orbit in the same direction at a small distance from each other. A container has to be thrown from the first satellite on the second a one. When will the container reach the second satellite earlier, if it is thrown in the direction of motion of the first satellite or in the opposite direction? The velocity of the container is small in comparison to that of the satellite. |
| Answer» <html><body><p></p>Solution :If the container is thrown in the direction opposite to the motion of the satellite, it will begin to move along an ellipse (say1) lying inside the circular orbit of the satellites. The period of revolution will be slightly <a href="https://interviewquestions.tuteehub.com/tag/less-1071906" style="font-weight:bold;" target="_blank" title="Click to know more about LESS">LESS</a> than that of te satellites. Therefore, they can met at the point of <a href="https://interviewquestions.tuteehub.com/tag/contact-25916" style="font-weight:bold;" target="_blank" title="Click to know more about CONTACT">CONTACT</a> of the orbits (circular orbit of satellite and the <a href="https://interviewquestions.tuteehub.com/tag/elliptical-969654" style="font-weight:bold;" target="_blank" title="Click to know more about ELLIPTICAL">ELLIPTICAL</a> orbit of the container) only after a reat number of revolution. On the other hand, if the container is thrown in the direction of the satellite, the container begins to move along an ellipse, like 2 in the figure. The velocity <a href="https://interviewquestions.tuteehub.com/tag/u-1435036" style="font-weight:bold;" target="_blank" title="Click to know more about U">U</a> should be such that during one revolution of the container, satellite `B` also makes one revolution and in <a href="https://interviewquestions.tuteehub.com/tag/addition-367641" style="font-weight:bold;" target="_blank" title="Click to know more about ADDITION">ADDITION</a> covers the distance `AB`. So the container shoud be thrown in the direction of the first satellite. <br/> <img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/BMS_VOL2_C06_E01_054_S01.png" width="80%"/></body></html> | |
| 39944. |
Which of the following is the most precise device for measuring length : (a) a vernier callipers with 20 divisions on the sliding scale (b) a screw gauge of pitch 1 mm and 100 divisions on the circular scale. ("c") an optical instrument that can measure length to within a wavelength of light ? |
| Answer» <html><body><p></p><a href="https://interviewquestions.tuteehub.com/tag/solution-25781" style="font-weight:bold;" target="_blank" title="Click to know more about SOLUTION">SOLUTION</a> :The <a href="https://interviewquestions.tuteehub.com/tag/mass-1088425" style="font-weight:bold;" target="_blank" title="Click to know more about MASS">MASS</a> of <a href="https://interviewquestions.tuteehub.com/tag/jupiter-526813" style="font-weight:bold;" target="_blank" title="Click to know more about JUPITER">JUPITER</a> is very <a href="https://interviewquestions.tuteehub.com/tag/large-1066424" style="font-weight:bold;" target="_blank" title="Click to know more about LARGE">LARGE</a></body></html> | |
| 39945. |
The position x of a particle varies with time t as x = at^2 - bt^3 . The acceleration of the particle will be zero at time t equal to |
| Answer» <html><body><p>`a/b` <br/>`(<a href="https://interviewquestions.tuteehub.com/tag/2a-300249" style="font-weight:bold;" target="_blank" title="Click to know more about 2A">2A</a>)/(<a href="https://interviewquestions.tuteehub.com/tag/3b-310586" style="font-weight:bold;" target="_blank" title="Click to know more about 3B">3B</a>)` <br/>`(a)/(3b)` <br/>0</p>Answer :<a href="https://interviewquestions.tuteehub.com/tag/c-7168" style="font-weight:bold;" target="_blank" title="Click to know more about C">C</a></body></html> | |
| 39946. |
Which of the following graph represents uniform motion |
| Answer» <html><body><p><img src="https://doubtnut-static.s.llnwi.net/static/physics_images/AKS_NEO_CAO_PHY_XI_V01_MP1_C03_E01_039_O01.png" width="30%"/><br/><img src="https://doubtnut-static.s.llnwi.net/static/physics_images/AKS_NEO_CAO_PHY_XI_V01_MP1_C03_E01_039_O02.png" width="30%"/><br/><img src="https://doubtnut-static.s.llnwi.net/static/physics_images/AKS_NEO_CAO_PHY_XI_V01_MP1_C03_E01_039_O03.png" width="30%"/><br/><img src="https://doubtnut-static.s.llnwi.net/static/physics_images/AKS_NEO_CAO_PHY_XI_V01_MP1_C03_E01_039_O04.png" width="30%"/></p><a href="https://interviewquestions.tuteehub.com/tag/answer-15557" style="font-weight:bold;" target="_blank" title="Click to know more about ANSWER">ANSWER</a> :A</body></html> | |
| 39947. |
When two right angled vectors of magnitude 7 units and 24 units combine , what is magnitude of their resultant? |
| Answer» <html><body><p></p><a href="https://interviewquestions.tuteehub.com/tag/solution-25781" style="font-weight:bold;" target="_blank" title="Click to know more about SOLUTION">SOLUTION</a> :<a href="https://interviewquestions.tuteehub.com/tag/25-296426" style="font-weight:bold;" target="_blank" title="Click to know more about 25">25</a> <a href="https://interviewquestions.tuteehub.com/tag/units-1438468" style="font-weight:bold;" target="_blank" title="Click to know more about UNITS">UNITS</a></body></html> | |
| 39948. |
Rain drops are falling down ward vertically at 4 kmph. For a person moving forward at 3kmph feels the rain at |
| Answer» <html><body><p><a href="https://interviewquestions.tuteehub.com/tag/7-332378" style="font-weight:bold;" target="_blank" title="Click to know more about 7">7</a> kmph<br/>1 kmph<br/>5 kmph<br/>25 kmph</p>Answer :<a href="https://interviewquestions.tuteehub.com/tag/c-7168" style="font-weight:bold;" target="_blank" title="Click to know more about C">C</a></body></html> | |
| 39949. |
One mole of an ideal gas is taken through a cyclic process as shown in the V-T diagram. Which of the following statements is true ? |
| Answer» <html><body><p>The <a href="https://interviewquestions.tuteehub.com/tag/magnitude-1083080" style="font-weight:bold;" target="_blank" title="Click to know more about MAGNITUDE">MAGNITUDE</a> of work <a href="https://interviewquestions.tuteehub.com/tag/done-2591742" style="font-weight:bold;" target="_blank" title="Click to know more about DONE">DONE</a> by the gas is `RT_(<a href="https://interviewquestions.tuteehub.com/tag/0-251616" style="font-weight:bold;" target="_blank" title="Click to know more about 0">0</a>)ln2`.<br/>Work done by gas is `V_(0)T_(0)`<br/>Net work done by the gas is zero.<br/>Work done by the gas is `2RT_(0)ln2`.</p>Solution :`W_(AB) = W_(CA) = 0` (as volume is constant) <br/> `W_(DA) = RT_(0) ln((2V_(0))/(V_(0))) = RT_(0) ln2` <br/> `W_(BC) = R(2T_(0))ln ((V_(0))/(2V_(0))) = -2RT_(0) ln 2` <br/> Total work done by the gas is <br/> `W = W_(AB) + W_(BC) + W_(CD) + W_(DA)` <br/> `= 0 - 2RT_(0) ln 2 + 0 + RT_(0) ln 2 = -RT_(0) ln 2` <br/> or `|W| = RT_(0) ln 2` <br/> <img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/MTG_NEET_GID_PHY_XI_C08_E01_041_S01.png" width="80%"/></body></html> | |
| 39950. |
A train approaches a stationary observer, the velocity of train being 1/20 of the velocity of sound.A sharp blast is blown with the whistle of the engine at equal intervals of a second.Find the interval between the successive blasts as heard by the observer. |
| Answer» <html><body><p><br/></p><a href="https://interviewquestions.tuteehub.com/tag/answer-15557" style="font-weight:bold;" target="_blank" title="Click to know more about ANSWER">ANSWER</a> :19/20 s</body></html> | |