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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.
| 39351. |
The escape speed of a projectile on the earth’s surface is 11.2 km s^(–1) . A body is projected out with thrice this speed. What is the speed of the body far away from the earth? Ignore the presence of the sun and other planets. |
| 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> :`31.7` km/s</body></html> | |
| 39352. |
The atomic mass of carbon (diamond) is 12.01 U and density is 2.22xx10^(3)kg m^(-3),the raius of the carbon atom is |
| Answer» <html><body><p>2.32 `A^(<a href="https://interviewquestions.tuteehub.com/tag/0-251616" style="font-weight:bold;" target="_blank" title="Click to know more about 0">0</a>)`<br/>1.29 `A^(0)`<br/>3.52 `A^(0)`<br/>4.25 `A^(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/b-387190" style="font-weight:bold;" target="_blank" title="Click to know more about B">B</a></body></html> | |
| 39353. |
Find the angle between force vec(F) =(3hat(i)+4hat(j)-5hat(k)) unit and displacement vec(d)=(5hat(i)+4hat(j)+3hat(k)) unit , Also find the projection of F on d . |
| Answer» <html><body><p></p>Solution :`<a href="https://interviewquestions.tuteehub.com/tag/vec-723433" style="font-weight:bold;" target="_blank" title="Click to know more about VEC">VEC</a>(F) =<a href="https://interviewquestions.tuteehub.com/tag/3hat-1863202" style="font-weight:bold;" target="_blank" title="Click to know more about 3HAT">3HAT</a>(i)+4hat(j)-5hat(k)` <br/> `vec(d) =5hat(i)+4hat(j)+3hat(k)` <br/> `vec(F).vec(d) =(3hat(i)+4hat(j)-5hat(k)).(5hat(i)+4hat(j)+3hat(k))`<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>+16 - 15`<br/> = 16 unit<br/>` | vec(F) | = sqrt((3)^(2)+(4)^(2)+(-5)^(2))`<br/> `= sqrt(9+16+25)`<br/> ` =sqrt(50)` <br/> `|vec(F)| =sqrt((3)^(2)+(4)^(2)+(-5)^(2))`<br/> `=sqrt(25+16+9)` <br/> `= sqrt(50)` <br/> `|vec(d)|=sqrt((3)^(2)+(4)^(2)+(-5)^(2))` <br/> Now `vec(F).vec(d) =| vec(F) | |vec(d)| cos theta `<br/> ` :. cos theta= (vec(F).vec(d))/(|vec(F)||vec(d)|)` <br/> `= 16/((sqrt(15))(sqrt(50)))` <br/> ` =16/15` <br/> ` :. cos theta =0.32` <br/> `sin(90^(@) - theta) = 0.32 ` <br/> `90^(@) - theta =18^(@)40` <br/> ` :. theta = 90^(@) - 18^(@) 40` <br/> ` :.theta = 71^(@) <a href="https://interviewquestions.tuteehub.com/tag/21-293276" style="font-weight:bold;" target="_blank" title="Click to know more about 21">21</a> ` <br/> <a href="https://interviewquestions.tuteehub.com/tag/projection-1169328" style="font-weight:bold;" target="_blank" title="Click to know more about PROJECTION">PROJECTION</a> of F on d <br/>=`F cos theta ` <br/> ` = sqrt(50) xx0.32 ` <br/> ` = 2.263` N<br/> <img src="https://doubtnut-static.s.llnwi.net/static/physics_images/KPK_AIO_PHY_XI_P1_C06_E02_001_S01.png" width="80%"/></body></html> | |
| 39354. |
A ball whoes K.E is K is projected at an angle 45° to the horizental.The K.E of the ball at the hightest point of flight is |
| Answer» <html><body><p><a href="https://interviewquestions.tuteehub.com/tag/k-527196" style="font-weight:bold;" target="_blank" title="Click to know more about K">K</a><br/>`k/sqrt2`<br/>k/2<br/>Zero</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> | |
| 39355. |
A travelling in a stretched string is described by the equation y-A sin (kx - omegat). The maximum practicle velocity is |
| Answer» <html><body><p>`<a href="https://interviewquestions.tuteehub.com/tag/aomega-2436739" style="font-weight:bold;" target="_blank" title="Click to know more about AOMEGA">AOMEGA</a>`<br/>`omega/k`<br/>`(<a href="https://interviewquestions.tuteehub.com/tag/domega-2591335" style="font-weight:bold;" target="_blank" title="Click to know more about DOMEGA">DOMEGA</a>)/(<a href="https://interviewquestions.tuteehub.com/tag/dk-432116" style="font-weight:bold;" target="_blank" title="Click to know more about DK">DK</a>)`<br/>x/t</p>Answer :A</body></html> | |
| 39356. |
A boat moves relative to water with a velocity which is a times less than the river flow velocity . At angle of the stream direction must the boat move to minimise drifting? |
| 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> :`[pi/2+sin^(-<a href="https://interviewquestions.tuteehub.com/tag/1-256655" style="font-weight:bold;" target="_blank" title="Click to know more about 1">1</a>)(1/n)]`</body></html> | |
| 39357. |
A ball rolls off the top of a stairway with a horizontal velocity of magnitude 150 cm/sec. The steps are 20 cm high and 20 cm wide. Which step will the ball hit first? |
| Answer» <html><body><p></p>Solution :Let x be the horizontal distance measured from the foot of the edge of the step, the <a href="https://interviewquestions.tuteehub.com/tag/ball-891849" style="font-weight:bold;" target="_blank" title="Click to know more about BALL">BALL</a> leaves the <a href="https://interviewquestions.tuteehub.com/tag/top-1422115" style="font-weight:bold;" target="_blank" title="Click to know more about TOP">TOP</a> of stairway to the point it hits the nth step. <br/> `x=v_(0)t=1.5t`. …………….i <br/> where `v_(0)` is the initial horizontal <a href="https://interviewquestions.tuteehub.com/tag/speed-1221896" style="font-weight:bold;" target="_blank" title="Click to know more about SPEED">SPEED</a>. The height of the ball drops through is <br/> `y=nH=0.2n`..........ii <br/> Where n is the <a href="https://interviewquestions.tuteehub.com/tag/numer-1126556" style="font-weight:bold;" target="_blank" title="Click to know more about NUMER">NUMER</a> of steps and H=20cm is the height of each step. As the vertical component of initial velocity is zero, the vertical distance <a href="https://interviewquestions.tuteehub.com/tag/traversed-7717243" style="font-weight:bold;" target="_blank" title="Click to know more about TRAVERSED">TRAVERSED</a> in the same time t is <br/> <img src="https://doubtnut-static.s.llnwi.net/static/physics_images/AKS_ELT_AI_PHY_XI_V01_A_C05_SLV_023_S01.png" width="80%"/> <br/> `y=1/2"gt"^(2)`........iii <br/> and `x=nw=0.2`n.......iv <br/> `x=y=0.2n`........iv <br/> `V_(0)t=1/2"gt"^(2),t=(2V_(0))/g=(2xx150xx10^(-2))/10` <br/> `impliest=0.3s` <br/> `:.0.2n=1.5(0.3)impliesn=2.25m:.n=3`</body></html> | |
| 39358. |
A loud of 10 kg stretches a wire 5 m long und 1 mm diameter by 0.3 mm. Find Young.s modulus of the material of the wire and energy stored in the wire. |
| 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> :`0.0174J,<a href="https://interviewquestions.tuteehub.com/tag/2-283658" style="font-weight:bold;" target="_blank" title="Click to know more about 2">2</a>.08xx10^(<a href="https://interviewquestions.tuteehub.com/tag/12-269062" style="font-weight:bold;" target="_blank" title="Click to know more about 12">12</a>)N//m^(2)`</body></html> | |
| 39359. |
A mass of 3.9kg suspended from a string of length 0.5m is at rest. Another body of mass 0.1 kg moving horizontally with a velcocity 200 ms^(-1) strikes and stricks to it. The maximum angle through which the system swings just before the tension in the string becomes zero is |
| Answer» <html><body><p>`<a href="https://interviewquestions.tuteehub.com/tag/60-328817" style="font-weight:bold;" target="_blank" title="Click to know more about 60">60</a>^(@)`<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>^(@)`<br/>`<a href="https://interviewquestions.tuteehub.com/tag/120-270396" style="font-weight:bold;" target="_blank" title="Click to know more about 120">120</a>^(@)`<br/>`<a href="https://interviewquestions.tuteehub.com/tag/180-279527" style="font-weight:bold;" target="_blank" title="Click to know more about 180">180</a>^(@)`</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> :D</body></html> | |
| 39360. |
What is meant by 'Molecular range' ? |
| 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> :It is the maximum distance upto which a <a href="https://interviewquestions.tuteehub.com/tag/molecule-563028" style="font-weight:bold;" target="_blank" title="Click to know more about MOLECULE">MOLECULE</a> can exert force of <a href="https://interviewquestions.tuteehub.com/tag/attraction-887653" style="font-weight:bold;" target="_blank" title="Click to know more about ATTRACTION">ATTRACTION</a> on anothermolecule. It is of the <a href="https://interviewquestions.tuteehub.com/tag/order-1138220" style="font-weight:bold;" target="_blank" title="Click to know more about ORDER">ORDER</a> of `10^(-9)` m for solid and liquids.</body></html> | |
| 39361. |
Ratio of the radius of a planet A to that of planet B is 'r'. The ratio ofacceleration due to gravity on the surface of the two planets is x. The ratio of the escape velocities from the two planets 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>(<a href="https://interviewquestions.tuteehub.com/tag/rx-628151" style="font-weight:bold;" target="_blank" title="Click to know more about RX">RX</a>)`<br/>`sqrt((<a href="https://interviewquestions.tuteehub.com/tag/r-611811" style="font-weight:bold;" target="_blank" title="Click to know more about R">R</a> )/(<a href="https://interviewquestions.tuteehub.com/tag/x-746616" style="font-weight:bold;" target="_blank" title="Click to know more about X">X</a>))`<br/>`sqrt(r )`<br/>`sqrt((x)/(r ))`</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> | |
| 39362. |
A lead shot of 1 mm diameter falls through a long column of glycerin. The variation of its velocity v with distance covered s is represented by: |
| Answer» <html><body><p><img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/PRE_GRG_PHY_XI_V02_C07_E06_031_O01.png" width="30%"/><br/><img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/PRE_GRG_PHY_XI_V02_C07_E06_031_O02.png" width="30%"/><br/><img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/PRE_GRG_PHY_XI_V02_C07_E06_031_O03.png" width="30%"/><br/><img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/PRE_GRG_PHY_XI_V02_C07_E06_031_O04.png" width="30%"/></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> :Initially, the velocity increases <a href="https://interviewquestions.tuteehub.com/tag/due-433472" style="font-weight:bold;" target="_blank" title="Click to know more about DUE">DUE</a> to the action of gravity. But the graph is not linear due to the upthrust exerted by <a href="https://interviewquestions.tuteehub.com/tag/glycerine-474196" style="font-weight:bold;" target="_blank" title="Click to know more about GLYCERINE">GLYCERINE</a>. Then due to <a href="https://interviewquestions.tuteehub.com/tag/viscosity-13767" style="font-weight:bold;" target="_blank" title="Click to know more about VISCOSITY">VISCOSITY</a> of glycerine, the lead shots <a href="https://interviewquestions.tuteehub.com/tag/attains-887546" style="font-weight:bold;" target="_blank" title="Click to know more about ATTAINS">ATTAINS</a> a constant terminal velocity.</body></html> | |
| 39363. |
A pipe having an internal diameter 'D' is connected to another pipe of same size. Water flows into the second pipe through 'n' holes, each of diameter 'd'. If the water in the first pipe has speed 'v' the speed of water leaving the second pipe is |
| Answer» <html><body><p>`( D^(<a href="https://interviewquestions.tuteehub.com/tag/2-283658" style="font-weight:bold;" target="_blank" title="Click to know more about 2">2</a>) <a href="https://interviewquestions.tuteehub.com/tag/v-722631" style="font-weight:bold;" target="_blank" title="Click to know more about V">V</a>)/( <a href="https://interviewquestions.tuteehub.com/tag/nd-576191" style="font-weight:bold;" target="_blank" title="Click to know more about ND">ND</a>^(2) )`<br/>`( nD^(2) v)/( d^(2) )`<br/>` ( nd^(2) v)/( D^(2) )`<br/>`( d^(2) v)/( nD^(2) )`</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> | |
| 39364. |
On a smooth inclined plane a body of mass M is attached between two springs. The other ends of the springs ar fixed to firm supports. If each spring has a force constant k, find the period of oscillation of the body. |
| 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> :`k_(eff)=2K` <br/> `:.T=2pisqrt(M/(2k))` <br/> <a href="https://interviewquestions.tuteehub.com/tag/period-1151023" style="font-weight:bold;" target="_blank" title="Click to know more about PERIOD">PERIOD</a> (or `k_(eff)`) is independent of `<a href="https://interviewquestions.tuteehub.com/tag/theta-1412757" style="font-weight:bold;" target="_blank" title="Click to know more about THETA">THETA</a>`<br/> <img src="https://doubtnut-static.s.llnwi.net/static/physics_images/AKS_NEO_CAO_PHY_XI_V01_MP2_C08_SLV_054_S01.png" width="80%"/></body></html> | |
| 39365. |
If K and sigma respectively are the thermal and electrical conductivities of a metal absolute temperature T, then: |
| Answer» <html><body><p>`(<a href="https://interviewquestions.tuteehub.com/tag/k-527196" style="font-weight:bold;" target="_blank" title="Click to know more about K">K</a>)/(sigmaT)`= <a href="https://interviewquestions.tuteehub.com/tag/constant-930172" style="font-weight:bold;" target="_blank" title="Click to know more about CONSTANT">CONSTANT</a> <br/>`(K)/(<a href="https://interviewquestions.tuteehub.com/tag/sigma-1207107" style="font-weight:bold;" target="_blank" title="Click to know more about SIGMA">SIGMA</a>)` = constant <br/>`(K)/(T)` = constant <br/>`(sigma)/(<a href="https://interviewquestions.tuteehub.com/tag/kt-1063108" style="font-weight:bold;" target="_blank" title="Click to know more about KT">KT</a>)`= constant </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> | |
| 39366. |
Bulk modulus is sometimes reffered to as |
| Answer» <html><body><p>compressibility <br/><a href="https://interviewquestions.tuteehub.com/tag/incompressibility-1040188" style="font-weight:bold;" target="_blank" title="Click to know more about INCOMPRESSIBILITY">INCOMPRESSIBILITY</a> <br/><a href="https://interviewquestions.tuteehub.com/tag/ductility-16368" style="font-weight:bold;" target="_blank" title="Click to know more about DUCTILITY">DUCTILITY</a> <br/>porosity </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> | |
| 39367. |
The displacement of a body moving along a straight line is given by : S = bt^(n),where 'b' is a constant and 't' is time. For what value of 'n' the body moves under the action of constant force ? |
| Answer» <html><body><p>`3//<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/>1<br/>2<br/>`1//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> :`F=ma, F=m(d^(2)S)/(<a href="https://interviewquestions.tuteehub.com/tag/dt-960413" style="font-weight:bold;" target="_blank" title="Click to know more about DT">DT</a>^(2))="<a href="https://interviewquestions.tuteehub.com/tag/constant-930172" style="font-weight:bold;" target="_blank" title="Click to know more about CONSTANT">CONSTANT</a>"`</body></html> | |
| 39368. |
A satellite is revolving near the earth.s surface. Its orbital velocity depends on its mass .m. as |
| Answer» <html><body><p>`m^0`<br/>`m`<br/>`m^2`<br/>`m^3`</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> | |
| 39369. |
A person is standing on a platform rotating with an angular speed of rps. With streched hands carrying weights On drqwing his close to the body the M.I. of the system changes from 8 "kgm"^(2) to "4kgm"^(2) The increase in his energy nearly is |
| Answer» <html><body><p><a href="https://interviewquestions.tuteehub.com/tag/320-307501" style="font-weight:bold;" target="_blank" title="Click to know more about 320">320</a> J<br/>40 J<br/>80 J<br/>160 J</p>Answer :D</body></html> | |
| 39370. |
In an aluminium sheet there is a hole diameter 1 m and is horizontally mounted on a stand. On this hole an iron sphere of diameter 1.004 m is resting. Initial temperature of this system is 25^(@)C. Find at what temperature, the iron sphere will fall down through the hole in sheet. The coefficients of linear expansion for aluminium and iron are 2.4xx10^(-5) and 1.2xx10^(-5) respectively. |
| Answer» <html><body><p></p>Solution :A value of coefficient of <a href="https://interviewquestions.tuteehub.com/tag/linear-1074458" style="font-weight:bold;" target="_blank" title="Click to know more about LINEAR">LINEAR</a> expansion for aluminium is more than that for <a href="https://interviewquestions.tuteehub.com/tag/iron-1051344" style="font-weight:bold;" target="_blank" title="Click to know more about IRON">IRON</a>, it expands faster than iron. So at some higher temperature when diameter of hole will exactlky become equal to that of iron sphere, the sphere will pass throughthe hole. Let it happen at some higher temperature T. Thus we have at this temperature T, <br/>` ("diameter of hole")_(Al) = ("diameter of sphere")_("iron")` <br/> `1[1+alpha_(Al) (T-<a href="https://interviewquestions.tuteehub.com/tag/25-296426" style="font-weight:bold;" target="_blank" title="Click to know more about 25">25</a>)]=1.004[1+alpha_("iron") (T-25)]` <br/> `alpha_(Al)(T-25)=<a href="https://interviewquestions.tuteehub.com/tag/0-251616" style="font-weight:bold;" target="_blank" title="Click to know more about 0">0</a>.004+1.004 alpha_("iron") (T-25)` <br/> `or T=((0.004)/(alpha_(Al) -1.004alpha_("iron"))+25)""^(@)C or T=(0.004)/(1xx2.4xx10^(-5)-1.004xx1.2xx10^(-5))+25 or T =359.7^(0)C`</body></html> | |
| 39371. |
A mass of gas is first expanded isothermally and then compressed adiabatically to its original volume. What further simplest operation must be performed on the gas to restore it to its original state? |
| Answer» <html><body><p>An <a href="https://interviewquestions.tuteehub.com/tag/isobaric-1052329" style="font-weight:bold;" target="_blank" title="Click to know more about ISOBARIC">ISOBARIC</a> cooling to bring its temperature to initial value<br/>An isochoric cooling to bring its <a href="https://interviewquestions.tuteehub.com/tag/pressure-1164240" style="font-weight:bold;" target="_blank" title="Click to know more about PRESSURE">PRESSURE</a> to its initial value <br/>An <a href="https://interviewquestions.tuteehub.com/tag/isothermal-520014" style="font-weight:bold;" target="_blank" title="Click to know more about ISOTHERMAL">ISOTHERMAL</a> <a href="https://interviewquestions.tuteehub.com/tag/process-11618" style="font-weight:bold;" target="_blank" title="Click to know more about PROCESS">PROCESS</a> to take its pressure to its initial value <br/>An isochoric heating to bring its temperature to initial value </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> | |
| 39372. |
Pick out the two scalar quantities in the following list : force , angular momentum , work current , linear momentum , electric field, average velocity , magnetic moment , relative velocity. |
| 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/work-20377" style="font-weight:bold;" target="_blank" title="Click to know more about WORK">WORK</a> , <a href="https://interviewquestions.tuteehub.com/tag/current-940804" style="font-weight:bold;" target="_blank" title="Click to know more about CURRENT">CURRENT</a></body></html> | |
| 39373. |
A missile fired from a launcherr explode in mid air, its total |
| Answer» <html><body><p><a href="https://interviewquestions.tuteehub.com/tag/kinetic-533291" style="font-weight:bold;" target="_blank" title="Click to know more about KINETIC">KINETIC</a> energyincreases<br/>momentum increases<br/>kinetic <a href="https://interviewquestions.tuteehub.com/tag/energy-15288" style="font-weight:bold;" target="_blank" title="Click to know more about ENERGY">ENERGY</a> decreases<br/>momentum decreases</p>Answer :A</body></html> | |
| 39374. |
A man stands on a rotating platform, with his arms stretched horizontally holding a 5 kg weight in each hand. The angular speed of the platform is 30 revolutions per minute. The man then brings his arms Close to his body with the distance of each weight from the axis changing from 90 cm to 20 cm. The moment of inertia of the man together with the platform may be taken to be constant and equal to 7.6 kg m^(2). (a) What is his new angular speed? (Neglect friction.) (6) Iskinetic energy conserved in the process? If not, from where does the change come about? |
| Answer» <html><body><p></p>Solution :(a) 58.88rpm, (b) No, <a href="https://interviewquestions.tuteehub.com/tag/kinetic-533291" style="font-weight:bold;" target="_blank" title="Click to know more about KINETIC">KINETIC</a> <a href="https://interviewquestions.tuteehub.com/tag/energy-15288" style="font-weight:bold;" target="_blank" title="Click to know more about ENERGY">ENERGY</a> is not conserved in the process. Infact, as moment ofinertia <a href="https://interviewquestions.tuteehub.com/tag/decreases-946143" style="font-weight:bold;" target="_blank" title="Click to know more about DECREASES">DECREASES</a>. K.E. of rotation increases. This change comes about as work done by theman in <a href="https://interviewquestions.tuteehub.com/tag/bringing-402272" style="font-weight:bold;" target="_blank" title="Click to know more about BRINGING">BRINGING</a> his arms closer to his body.</body></html> | |
| 39375. |
In old age arteries carrying blood in the human body become narrow resulting in an increase in the blood pressure. This follows from: |
| Answer» <html><body><p><a href="https://interviewquestions.tuteehub.com/tag/pascal-596772" style="font-weight:bold;" target="_blank" title="Click to know more about PASCAL">PASCAL</a>'s law<br/><a href="https://interviewquestions.tuteehub.com/tag/bernoulli-395852" style="font-weight:bold;" target="_blank" title="Click to know more about BERNOULLI">BERNOULLI</a>'s principle<br/>Archimede's principle<br/>Stoke's law</p>Solution :<a href="https://interviewquestions.tuteehub.com/tag/blood-17749" style="font-weight:bold;" target="_blank" title="Click to know more about BLOOD">BLOOD</a> <a href="https://interviewquestions.tuteehub.com/tag/pressure-1164240" style="font-weight:bold;" target="_blank" title="Click to know more about PRESSURE">PRESSURE</a> in narrow arteries increases in <a href="https://interviewquestions.tuteehub.com/tag/accordance-846972" style="font-weight:bold;" target="_blank" title="Click to know more about ACCORDANCE">ACCORDANCE</a> with Bernoulli's principle.</body></html> | |
| 39376. |
The velocity 'v' reached by a car of mass 'm' at certain distance from the starting point driven with contatant power 'P' is such that |
| Answer» <html><body><p>`<a href="https://interviewquestions.tuteehub.com/tag/v-722631" style="font-weight:bold;" target="_blank" title="Click to know more about V">V</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> (3p)/(m)`<br/>`v^(2) alpha (3p)/(m)`<br/>`v^(3) alpha (3p)/(m)`<br/>`v alpha ((3p)/(m))^(2)`</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> | |
| 39377. |
The lines of forces act at a common point is called as |
| Answer» <html><body><p> <a href="https://interviewquestions.tuteehub.com/tag/concurrent-424328" style="font-weight:bold;" target="_blank" title="Click to know more about CONCURRENT">CONCURRENT</a> <a href="https://interviewquestions.tuteehub.com/tag/forces-16875" style="font-weight:bold;" target="_blank" title="Click to know more about FORCES">FORCES</a><br/>coplanar forces<br/>equilibrant <br/><a href="https://interviewquestions.tuteehub.com/tag/resultant-1187362" style="font-weight:bold;" target="_blank" title="Click to know more about RESULTANT">RESULTANT</a> </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> : concurrent forces</body></html> | |
| 39378. |
Consider a circular road of radius 20 meter banked at an angle of 15 degree. With what speed a car has to move on the turn so that it will have safe turn? |
| Answer» <html><body><p></p>Solution :`v = <a href="https://interviewquestions.tuteehub.com/tag/sqrt-1223129" style="font-weight:bold;" target="_blank" title="Click to know more about SQRT">SQRT</a>(vg tan <a href="https://interviewquestions.tuteehub.com/tag/theta-1412757" style="font-weight:bold;" target="_blank" title="Click to know more about THETA">THETA</a>) = sqrt(<a href="https://interviewquestions.tuteehub.com/tag/20-287209" style="font-weight:bold;" target="_blank" title="Click to know more about 20">20</a> xx 9.8 xx tan 15^@) = sqrt(20 xx 9.8 xx 0.26) = 7.1 m//s` <br/> The safe speed for the car on this road is `7.1 ms^(-1)`</body></html> | |
| 39379. |
In a hydel power project, 2000kg of water passes through the turbine every second. Water is falling from a height of 240m above ground. If the power output is 6.4 Mw, the efficiency of the power house is (g= 10 ms^(-2)) |
| Answer» <html><body><p>0.6<br/>0.75<br/>0.8<br/>0.9</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> | |
| 39380. |
A certain number of spherical drops of a liquid of radius R coalesce to form a single drop of radius R and volume V. If T is the surface tension of the liquid, then: |
| Answer» <html><body><p><a href="https://interviewquestions.tuteehub.com/tag/energy-15288" style="font-weight:bold;" target="_blank" title="Click to know more about ENERGY">ENERGY</a> `=4VT((1)/(<a href="https://interviewquestions.tuteehub.com/tag/r-611811" style="font-weight:bold;" target="_blank" title="Click to know more about R">R</a>)-(1)/(R))` is released<br/>energy `=3VT((1)/(r)+(1)/(R))` is absorbed<br/>energy `=3VT((1)/(r)-(1)/(R))` is released<br/>energy is <a href="https://interviewquestions.tuteehub.com/tag/neither-1113494" style="font-weight:bold;" target="_blank" title="Click to know more about NEITHER">NEITHER</a> released nor absorbed</p>Answer :C</body></html> | |
| 39381. |
A cyclist speeding at 18 km/h on a level road takes a sharp circular turn of radius 3 m without reducing the speed. The co-efficient of static friction between the tyres and the road is 0.1. Will the cyclist slip while taking the turn? |
| Answer» <html><body><p></p>Solution :On an unbanked road, frictional force alone can provide the centripetal force needed to keep the cyclist moving on a circular <a href="https://interviewquestions.tuteehub.com/tag/turn-1429043" style="font-weight:bold;" target="_blank" title="Click to know more about TURN">TURN</a> withoutslipping. If the <a href="https://interviewquestions.tuteehub.com/tag/speed-1221896" style="font-weight:bold;" target="_blank" title="Click to know more about SPEED">SPEED</a> is too large, or if the turn is too <a href="https://interviewquestions.tuteehub.com/tag/sharp-641613" style="font-weight:bold;" target="_blank" title="Click to know more about SHARP">SHARP</a> (i.e. of too small a radius) or both, the frictional force is not sufficient to provide the necessary centripetal force, and the cyclist slips. The condition for the cyclist not to slip is given by <a href="https://interviewquestions.tuteehub.com/tag/eq-446394" style="font-weight:bold;" target="_blank" title="Click to know more about EQ">EQ</a>. <br/> `v^2 lt= mu_s Rg` <br/>Now `R = <a href="https://interviewquestions.tuteehub.com/tag/3m-310999" style="font-weight:bold;" target="_blank" title="Click to know more about 3M">3M</a> , g = 9.8 ms^(-2) , mu_s = 0.1`. That is`mu_s Rg = 2.94 m^2 s^(-2) .v = 19 km//h = 5 ms^(-1) , i.e., v^2 = 25 m^2 s^(-2)` .The condition is not obeyed. The cyclist will slip while taking the circular turn.</body></html> | |
| 39382. |
At time t=0 one particle is at maximum positive amplitude and the other particle is at half of the positive amplitude. Their amplitudes and time periods T are same. If they are approaching, find the time by which they cross each other: |
| Answer» <html><body><p>`T//6`<br/>`T//12`<br/>`T//16`<br/>`T//24`</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> | |
| 39383. |
A thin square steel plate with each side equal to 10 cm is heated by a blacksmith. The rate of radiated energy by the heated plate is 1134 W. The temperature of the hot steel plate is (Stefan's constant sigma^(-) = 5.67 xx 10^(-8) watt m^(-2) k^(-4), emissivity of the plate=1 ) |
| Answer» <html><body><p><a href="https://interviewquestions.tuteehub.com/tag/1000-265236" style="font-weight:bold;" target="_blank" title="Click to know more about 1000">1000</a> K<br/>1189 K<br/>2000 K<br/>2373 K</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> | |
| 39384. |
The M.I of a uniform thin circular ring about an axis through its centre and normal to the plane of ring is I. Its M.I about a tangent in its plane is equal to |
| Answer» <html><body><p>`1.5I`<br/>`<a href="https://interviewquestions.tuteehub.com/tag/2-283658" style="font-weight:bold;" target="_blank" title="Click to know more about 2">2</a>.5I`<br/>`(I)/(2)`<br/>`<a href="https://interviewquestions.tuteehub.com/tag/2i-300397" style="font-weight:bold;" target="_blank" title="Click to know more about 2I">2I</a>`</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> | |
| 39385. |
A Carnot's engine extract 1.5 xx 10^(3) kilocalorie of heat from a reservoir at 627^(@)C and exhaust it to a sink maintained at 27^(@)C. How much work is performed by the engine ? |
| Answer» <html><body><p></p>Solution :Efficiency of <a href="https://interviewquestions.tuteehub.com/tag/carnot-413615" style="font-weight:bold;" target="_blank" title="Click to know more about CARNOT">CARNOT</a> engine `eta = 1-(T_(2))/(T_(1))` <br/> `:.` <a href="https://interviewquestions.tuteehub.com/tag/work-20377" style="font-weight:bold;" target="_blank" title="Click to know more about WORK">WORK</a> performed by engine `= (1-(T_(2))/(T_(1)))Q` <br/> `:. W = (1-(300)/(900)) xx (1.5 xx 10^(<a href="https://interviewquestions.tuteehub.com/tag/3-301577" style="font-weight:bold;" target="_blank" title="Click to know more about 3">3</a>) xx 10^(3))<a href="https://interviewquestions.tuteehub.com/tag/cal-412083" style="font-weight:bold;" target="_blank" title="Click to know more about CAL">CAL</a>` <br/> or `W = (2)/(3) xx 1.5 xx 10^(6) xx 4.2 J = 4.2 = 4.2 xx 10^(6) J` <br/> `:. W = 4.2 xx 10^(6) J`.</body></html> | |
| 39386. |
Of the following quantities, which one has dimensions different from the remaining three? |
| Answer» <html><body><p><a href="https://interviewquestions.tuteehub.com/tag/energy-15288" style="font-weight:bold;" target="_blank" title="Click to know more about ENERGY">ENERGY</a> <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/unit-1438166" style="font-weight:bold;" target="_blank" title="Click to know more about UNIT">UNIT</a> volume<br/>Force per unit area<br/>Product of <a href="https://interviewquestions.tuteehub.com/tag/voltage-1447811" style="font-weight:bold;" target="_blank" title="Click to know more about VOLTAGE">VOLTAGE</a> and <a href="https://interviewquestions.tuteehub.com/tag/charge-914384" style="font-weight:bold;" target="_blank" title="Click to know more about CHARGE">CHARGE</a> per unit volume<br/>Angular momentum</p>Answer :D</body></html> | |
| 39387. |
The respective speeds of five molecules are 2, 1.5, 1.6, 1.6 and 1.2 km/sec. The most probable speed in km/sec will be |
| Answer» <html><body><p>2<br/>1.58<br/>1.6<br/>1.31</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> | |
| 39388. |
Volume of the liquid flowing per second through a pipe of diameter d is V. At a point where the radius is d, the velocity of flow is |
| Answer» <html><body><p>`(V)/(d^(2))`<br/>`(V)/(<a href="https://interviewquestions.tuteehub.com/tag/pid-1154482" style="font-weight:bold;" target="_blank" title="Click to know more about PID">PID</a>^(2))`<br/>`(<a href="https://interviewquestions.tuteehub.com/tag/4v-318817" style="font-weight:bold;" target="_blank" title="Click to know more about 4V">4V</a>)/(pid^(2))`<br/>`(V)/(4pid^(2))`</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> | |
| 39389. |
The two forces 2sqrt2Nand xN are acting at a point their resultant is perpendicular to hatx Nand having magnitude of sqrt6 N . The angle between the two forces and magnitude of x are |
| Answer» <html><body><p>`theta = <a href="https://interviewquestions.tuteehub.com/tag/120-270396" style="font-weight:bold;" target="_blank" title="Click to know more about 120">120</a>^@ , <a href="https://interviewquestions.tuteehub.com/tag/x-746616" style="font-weight:bold;" target="_blank" title="Click to know more about X">X</a> = sqrt2N` <br/>`theta =30^@ , x= sqrt2N` <br/>`theta = <a href="https://interviewquestions.tuteehub.com/tag/150-275254" style="font-weight:bold;" target="_blank" title="Click to know more about 150">150</a>^@ , x = sqrt3 N` <br/>`theta= 150^@ , x= sqrt2N`</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> | |
| 39390. |
For a given vernier scale, 10 main scale divisions are equal to 1 cm and 10 VSD coincide with 9MSD. The zero of the vernier is to the right of the zero of the main scale with 6VSD's coinciding MSD's, when the two jaws are in contact. The reading for the measurement of length is 4.3 cm with 2VSD's coinciding the scale graduation, then the correct length is |
| Answer» <html><body><p>4.26 <a href="https://interviewquestions.tuteehub.com/tag/cm-919986" style="font-weight:bold;" target="_blank" title="Click to know more about CM">CM</a> <br/>4.38 cm <br/>4.32 cm <br/>4.30 cm </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> | |
| 39391. |
The set of quantities which cannot form a group of fundamental quantities in any system of measurement is |
| 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>, <a href="https://interviewquestions.tuteehub.com/tag/mass-1088425" style="font-weight:bold;" target="_blank" title="Click to know more about MASS">MASS</a> and <a href="https://interviewquestions.tuteehub.com/tag/time-19467" style="font-weight:bold;" target="_blank" title="Click to know more about TIME">TIME</a><br/>Length, Mass and velocity<br/>Mass, time and velocity<br/>Length, Time and velocity</p>Answer :D</body></html> | |
| 39392. |
The magintude of velocity of projectile and time are related as(v^(2))/(a^(2))-(t- (b)/(a))^(2)=(c^(2))/(a^(2)) then {:(" Column-I","Column-II"),("A) Range","P) C"),("B) Height","Q) "2b//a),("C) Time of flight","R) " 2bc//a),("D) Velocity at maximum height","T) "ab//c):} |
| 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-R; B-S; C-Q; D-P</body></html> | |
| 39393. |
(A) : In summer, the pendulum clock runs slow. (R) : As temperature increases, length of the pendulum decreases and time period decreases |
| Answer» <html><body><p>Both 'A' and '<a href="https://interviewquestions.tuteehub.com/tag/r-611811" style="font-weight:bold;" target="_blank" title="Click to know more about R">R</a>' are true and 'R' is the correct <a href="https://interviewquestions.tuteehub.com/tag/explanation-455162" style="font-weight:bold;" target="_blank" title="Click to know more about EXPLANATION">EXPLANATION</a> of 'A' <br/>Both 'A' and 'R' are true and 'R' is not the correct explanation of 'A' <br/>A' is true and 'R' is <a href="https://interviewquestions.tuteehub.com/tag/false-459184" style="font-weight:bold;" target="_blank" title="Click to know more about FALSE">FALSE</a> <br/>A' is false and 'R' is true </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> | |
| 39394. |
An iceberg of density 900 kg//m^(3) is floating in water of density 1000 kg//m^(3). The percentage of volume of ice cube outside the water is |
| Answer» <html><body><p>0.2<br/>0.35<br/>0.1<br/>0.25</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> | |
| 39395. |
How many disintegrations per second make up 1 curie ? |
| Answer» <html><body><p>`3.7xx10^(<a href="https://interviewquestions.tuteehub.com/tag/10-261113" style="font-weight:bold;" target="_blank" title="Click to know more about 10">10</a>)`<br/>`3.7xx10^(<a href="https://interviewquestions.tuteehub.com/tag/13-271882" style="font-weight:bold;" target="_blank" title="Click to know more about 13">13</a>)`<br/>`3.7xx10^7`<br/><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 :(a)</body></html> | |
| 39396. |
A long capillary tube of radius 0.2mm is placed vertically inside a beaker of waterIf the surface tension of water is 7.2 xx 10^(-7)N/m and the angle of contact between glass and water is zero. Then determine the height of the water column in the tube |
| Answer» <html><body><p>3 cm<br/> 9 cm<br/>7 cm <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> cm</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> | |
| 39397. |
If the ends of rod of length L have velocities barV_(A) and barV_(B), find the velocity of mid point of the rod. |
| 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> :`barVc=(barV_(A)+barV_(<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/2-283658" style="font-weight:bold;" target="_blank" title="Click to know more about 2">2</a>)`</body></html> | |
| 39398. |
A rod weight W is supported by two parallel knife edges A and B is in equilibrium in a horizontal position. The knives are at a dist once d from each other. The center of mass of the rod is at distance x from A. The normal reaction on A is |
| Answer» <html><body><p>`(<a href="https://interviewquestions.tuteehub.com/tag/w-729065" style="font-weight:bold;" target="_blank" title="Click to know more about W">W</a>(d-<a href="https://interviewquestions.tuteehub.com/tag/x-746616" style="font-weight:bold;" target="_blank" title="Click to know more about X">X</a>))/(d)`<br/>`(<a href="https://interviewquestions.tuteehub.com/tag/wx-1462322" style="font-weight:bold;" target="_blank" title="Click to know more about WX">WX</a>)/(d)`<br/>`(<a href="https://interviewquestions.tuteehub.com/tag/wd-729586" style="font-weight:bold;" target="_blank" title="Click to know more about WD">WD</a>)/(x)`<br/>`(W(d-x))/(x)`</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> | |
| 39399. |
Two masses m_(1)kg and m_(2)kg passes over a pulley. Find the ratio of the masses m_(1) and m_(2) so that string passes over the pulley will just start slipping over is surface. The friction coefficient between the string and pulley surface is 0.2 |
| Answer» <html><body><p> </p>Solution :From the ideas of laws of motion, for the <a href="https://interviewquestions.tuteehub.com/tag/two-714195" style="font-weight:bold;" target="_blank" title="Click to know more about TWO">TWO</a> masses, `m_(1)g-T_(1)=M_(1)a........(1)` <br/> and `T_(<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_(2)g=m_(2)a.......(2)` <br/> and if string <a href="https://interviewquestions.tuteehub.com/tag/starts-1224822" style="font-weight:bold;" target="_blank" title="Click to know more about STARTS">STARTS</a> slipping we have `T_(1)=T_(2)e^(mupi)`<br/> <a href="https://interviewquestions.tuteehub.com/tag/solving-1217196" style="font-weight:bold;" target="_blank" title="Click to know more about SOLVING">SOLVING</a> the above equations<br/> `m_(1)(g-a)=m_(2)(g+a)e^(mupi)`<br/> if string just slipps we can use a=0, <a href="https://interviewquestions.tuteehub.com/tag/thus-2307358" style="font-weight:bold;" target="_blank" title="Click to know more about THUS">THUS</a> we have `m_(1)/m_(2)=e^(0.2pi)`</body></html> | |
| 39400. |
Statement A: Energy is the cause for doing work and work is the effect Statement B: Energy is a scalar but power is a vector quantity |
| Answer» <html><body><p>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> is <a href="https://interviewquestions.tuteehub.com/tag/correct-409949" style="font-weight:bold;" target="_blank" title="Click to know more about CORRECT">CORRECT</a><br/>A & B are <a href="https://interviewquestions.tuteehub.com/tag/wrong-1462035" style="font-weight:bold;" target="_blank" title="Click to know more about WRONG">WRONG</a><br/>A is correct and B is wrong<br/>A is wrong & B is correct</p>Answer :C</body></html> | |