InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 8951. |
The e.m.f. of a cell of negligible internalresistance is 2 V. It is connected to the seriescombination of 2 Ω, 3 Ω and 5 Ω resistances.The potential difference across 3 S2 resistancewill be(A) 0.6 V(C) 3 V(B) 10 V(D) 6 V |
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Answer» total resistance in series = 2+3+5 = 10Ω now current flowing in the circuit is = V/R = 2/10 = 1/5A so, potential difference across 3Ω is = i*r = 3/5v = 0.6v option A |
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| 8952. |
2 52While performing the experiment to findmaking a circuit as shown above, Reena measured reading of voltmeter 'V' which givedifferences between P and Q. The rcading will be(a) 2 Vequivalent reistance of a combination of resistance bys potential(b) 4 V(c) 6 V(d) 8 V |
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Answer» Option c is correct. |
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| 8953. |
DATEPAGERaed the Hme ah whi he |
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| 8954. |
(v) (3a-5)(3a-22 |
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Answer» ( 3a - 1/2) ( 3a - 1/2) ( 3a - 1/2)² (3a)² + (1/2)² - 2 × (3a) × 1/2 9a² + 1/4 - 3a |
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| 8955. |
All plants and animals have a high content of water in their bodies |
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Answer» Animal life requires a steady supply of water to fulfill its vital functions. From transportation to lubrication to temperature regulation, water keeps animal life functioning; in fact, the bodies of animals consist mostly of water. All chemical reactions in the bodies of animals use water as a medium |
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| 8956. |
I I.2 ml Methane gas is given-com-any-then find outMethane gos at STP.at _samplemole of |
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| 8957. |
If L denotes the inductance of an inductor through whicha currect / is flowing, then the dimensional formula of LA(a) [MLT 21(b) [MLT 2](c) [MLT2](d) not expressible in terms of M. L. T.is |
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Answer» LI² = energy stored in the inductor.. so, dim(LI²) = dim of E => dim LI² = ML²T-² option b |
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| 8958. |
Difterentiate between regular and diffused reftection Does ditusedmiosen mean the faiture of the laws of reflection |
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| 8959. |
2. Give an example where diffused reflection is useful. |
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Answer» The light sent to our eyes by most of the objects we see is due to diffuse reflection from their surface, so that this is our primary mechanism of physical observation |
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| 8960. |
y=f(x) =2x-3/3x -2 Find f(y) |
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Answer» wrong answer answer is x |
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| 8961. |
A particle of mass m begins to slidevelocity. What is its tangential acceleration when it breaks off the sphere ?de down a fixed smooth sphere from the top with negligible intal(A) 2g(B) 959(C) 9933310 |
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| 8962. |
State two differences between a convex and a concave lens |
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| 8963. |
ゾ.State two differences between a convex and a concave lens. |
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| 8964. |
A particle is moving in X-Y plane under the actionof a force F such that at some instant 't' thecomponents of its linear momentum p are p, 2cos t and p, 2 sin t. At this instant the anglebetween and F and p is(A) 90°(C) 180°(B) 0°(D) 30° |
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Answer» P(x) = 2 cos(t), F(x) = dP(x)/dt = -2 sin(t) P(y) = 2 sin (t), F(y) = dP(y)/dt = 2 cos (t) Dot product of momentum and Force = F(x)*P(x) + F(y)*P(y) = -4 sin(t)cos(t) + 4 sin(t)cos(t) = 0 Since dot product is zero, angle between the two is 90 degrees |
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| 8965. |
A physical quantity X is given byXCIfthe percentage errors of measure-by x-edĹ , Ifthe percentage errors of measure-ectively, then calculate the %CVDment in A,B,C and D are 4%, 2%, 3% and 1 % reerror in X |
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| 8966. |
1.What is the reading for the spring balance as shown in the attached figure |
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| 8967. |
20. In thebalance machine shown in the figure, which arm will move downward (assume string and the puley to be ideal)2m4m(1) left(2) right(3) remains stationary(4) none of these |
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Answer» no it will move in right side downward |
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| 8968. |
The measured value of a capacitor is 205.5 Îź F, whereas its truevalue is 202.4 ÎźF.The relative error ist77 |
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Answer» Relative error = 1.53 percentage |
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| 8969. |
& A black slide down ond indoeoman achoei |
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| 8970. |
Example 2.11, Find the relative error in |
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Answer» The relative error in z is Δz/z = 4(Δa/a) +(1/3) (Δb/b) + (Δc/c) + (3/2) (Δd/d). |
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| 8971. |
achcottonaiuon.What is air pressure ? State the units to measure pressure.4. |
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Answer» Thedefinition of air pressureis the force exerted onto a surface by the weight of theair. An example ofair pressureis the average sea-levelair pressureof 101.325 kPA. The SI unit for pressure is the pascal (Pa), equal to one newton persquaremetre (N/m2, or kg. m. s−2). This name for the unit was added in 1971; before that, pressure in SI was expressed simply in newtons persquaremetre. |
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| 8972. |
4. A cuboid has volume V-Ix2I x3/, where I is the length ofone side. If the relative percentage error in the measurementof 1 is 1%, then the relative percentage error in measurementof V is(a) 18% (b) 6%(c) 3%(d) 1% |
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| 8973. |
The volume of air increases by 5% in itsadiabatic expansion. The percentage decreasein its pressure will be1,5%2.6%3.7%4.8% |
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| 8974. |
13.Compare the functioning of alveoli in the lungs and nephrons in the kidneys withrespect to their structure and functioning. |
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| 8975. |
Compare the functioning of alveoli in the lungs and nephrons in the kidneys withrespect to their structure and functioning3. |
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Answer» Structure.Alveoli are tiny balloon-like structures present inside the lungs. .Nephrons are tubular structures present inside the kidneys. .The walls of the alveoli are one cell thick and it contains an extensive network of blood capillaries. .Nephrons are made of glomerulus, bowman’s capsule, and a long renal tube. Function .The exchange of O2 and CO2 takes place between the blood of the capillaries that surround the alveoli and the gases present in the alveoli. . .The blood enters the kidneys through the renal artery. The blood is entered here and the nitrogenous waste in the form of urine is collected by collecting duct. .Alveoli are the site of gaseous exchange. Nephrons are the basic filtration unit. |
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| 8976. |
state the law of floatation |
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Answer» TheLaw of Flotationsays that for a floating object, the weight of the object equals the weight of the liquid displaced by the object. |
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| 8977. |
54. A simple pendulum consists of a 50 cm long stringconnected to a 100 g ball. The ball is pulled aside sothat the string makes an angle of 37° with the verticaland is then released. Find the tension in the string whenthe bob is at its lowest position. |
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| 8978. |
Find the capacitance of the combination shown in the fig; in between. A and B.2uF2uF2μ2pF2uF1PF1 pF1 PF |
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Answer» We know that for capacitors in series,C=C1*C2/(C1+C2)and for capacitors in parallel,C=C1+C2 Starting from the left side, and taking 2 capacitors at a time, 2uF and 2uF are in series, equivalent is 1uF.This 1uF is in parallel with 1uF, equivalent is 2uF.Proceeding in the same manner, we getequivalent capacitance between A and B= 1uF. |
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| 8979. |
3HR: (a) 10, (b)25 Ha,TT : 150 27 r10.TE; fTS ㈲ fhHt婀すη ί0HZU FFwg ㅎ i afe THİ 2功て/HETS 2虱襾τη 07, 게 11功て |
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| 8980. |
How can the real image of an object beobtained with a convex mirror?Delhi |
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| 8981. |
3. Write any three uses of plane mirrors in daily life. |
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Answer» Uses of a plane mirror:1. Plane mirrors are used in dressing tables to see ourselves.2. Plane mirrors are placed on the inside walls of the shops like jewelry shops.3. Plane mirrors are placed at the blind turns of some busy roads so that the drivers can see the vehicles coming from the other side to prevent from the accidents.4. Plane mirrors are used to construct periscopes and kaleidoscopes. |
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| 8982. |
3. The image obtained while finding the focal length of convex lens isa. a real and erect. b. virtual and erect. c. real and inverted. d. virtual and inverted |
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Answer» real and inverted images are formed in convex lens |
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| 8983. |
(a) an inverted and magnified image of the object? |
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Answer» What ai your question here? |
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| 8984. |
A real and inverted image of the same size isformed by a concave mirror when the objectis placed(a) between the mirror and its focus(b) between the focus and the centre ofcurvature(c) at the centre of curvature(d) beyond the centre of curvature. |
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Answer» at the centre of curvature(c) |
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| 8985. |
10. How can we increase the magnetic field in an electromagnet? |
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Answer» Putting a piece of iron or steel inside the coil makes themagnetstrong enough to attract objects. The strength of anelectromagnetcan be increased byincreasingthe number of loops of wire around the iron core and byincreasingthe current or voltage. |
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| 8986. |
What is an electromagnet |
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Answer» An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. The magnetic field disappears when the current is turned off. Electromagnets usually consist of wire wound into a coil |
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| 8987. |
inariE1. What is an electromagnet ? |
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Answer» a soft metal core made into a magnet by the passage of electric current through a coil surrounding it.hope this will help you like my answer and MARK IT AS BEST ANSWER. electromagnet are the shoft magnet which is though coilsurrounding it An electromagnet is a magnet that runs on electricity. Unlike a permanent magnet, the strength of an electromagnet can easily be changed by changing the amount of electric current that flows through it. The poles of an electromagnet can even be reversed by reversing the flow of electricity. An electromagnet works because an electric current produces a magnetic field. The magnetic field produced by an electric current forms circles around the electric current, as shown in the diagram below: in short answer we can say that those magnet which produce electricity is called electromagnet electromagnet /ɪˌlɛktrə(ʊ)ˈmaɡnɪt/ Learn to pronounce noun PHYSICS a soft metal core made into a magnet by the passage of electric current through a coil surrounding it. |
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| 8988. |
1) An electromagnet uses tmeltortu2) Electric fuse is based on the3) The shorter line in the symbol of electric cell representseffect of the electric current. |
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Answer» The elect the electric fuse is used on the basis of Joule effect of the electric current the shorter line symbol of the electric cell represent negativepart of cell what is the symbol of electric current |
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| 8989. |
7. Two small charged spheres A and B have charges 10uCand 40 ÎźC respectively and are held at separation of90 cm from cach other. At what distance from Aelectric field intensity would be zero?(a) 22.5 cm(c) 30 cm(b) 18 cm(d) 36 cm |
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| 8990. |
dlifferentiation the following funetiony = 3 cos x + 7e x + log (x2 + 1) |
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Answer» differentiate each partdy/dx=-3sinx+7e^x+(1/x^2+1)*2xdifferentiation of cosx=-sinxe^x=e^xlogx=1/x how can calculate it because when will differentiation of log(x^2+1)then answer because the function inside log is not a single value functionwe then need to apply chain rule to differentiate x^2+1 too |
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| 8991. |
o capacitors Ci and C are chargedTwo 20 v respectively.to 120 yconnecting themoethethe found th(2) 9C1 4C2(4) 3C1-5C2andthem together the potential onectingcan be made zero-(1) 3C1 +5C2 0each oneJEE-Main 20131(3) 5C1 3C2 |
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| 8992. |
\begin{array} { l } { \text { 5. Differentiate the following } } \\ { \frac { \sin x } { x ^ { 3 } } } \end{array} |
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| 8993. |
differentiation the followinÄ funetionlog(x2 +1) |
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Answer» how |
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| 8994. |
4. In fig. it is giverfig, it is given that AE = AD andRDCE. Prove that A AEB = A ADC |
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Answer» In ΔAEB and ΔADC AE = AD (Given) ∠EAB = ∠DAC (common) AB = AC { :- AE = AD and EC = BD } thus Δ AEB ≈ ΔADC (SAS congurency) Given, AE=ADBD=CEIn Δ AEB and ADC AE=AD(Given) Angle EAB = Angle DAC (Common) BD=CE(Given)ΔAEB is congruent to ADC (By SAS) hi |
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| 8995. |
find answer of hollow dis |
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Answer» The hollow rotary disk Turbik series, during its rotary-oscillating motion, causes a vacuum sucking the fluid inside the pump; in the meantime it pushes the fluid already present in the chamber to the downstream pipe |
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| 8996. |
5)The energy required to blow a bubble of radius 4cm and 3 cm in the same liquid is in the ratio of:(a) 4:3 (b) 3:4(c) 16:9 (d) 64:27 |
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Answer» will be proportional to the volume of those so it will be 64:27 |
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| 8997. |
(6) 8 + 9७ न 5, 8-0 1 झाएन मूपबब्र माशएया R (T Sab(a’ + b?) = 624 |
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Answer» a+b=5a-b=1 adding them we get2a=6=>a=3put a=3 in equation 1 to get b=>3+b=5=>b=2so 8ab(a²+b²)=8*2*3(9+4)=48(13)=624 |
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| 8998. |
(18. Find the ratio- PinVA= velocityVB = velocity(3) 1 |
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Answer» Velocity = dx/dtVa = tan (53)vb = tan 37Va/Vb = tan 53/ tan 37as differention means slope ( tan theeta) |
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| 8999. |
Where should an object be placed before a concave mirror of focal length 20 cm so that a realimage is formed at a distance of 60 cm from it? |
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Answer» but the u = -30 |
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| 9000. |
21.Find the voltage drop (Va) across Silicon diode in the circuit below.+ VaDiode(1) 2A22(a)(c)0.7 V0.42 V(b)(d)0.3 V0.052 V |
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