46 + Interview Questions in EXPERIMENTAL-PHYSICS IN GENERAL AWARENESS

1.	A capillary tube `A` is dipped in water. Another identical tube `B` is dipped in detergent-water solution. Which of the following shows the correct nature of meniscus of the liquid column in the two capillary tubes?A. Both shows convex meniscusB. Meniscus in both the cases are concaveC. InA, meniscus is concave while in `B` it is convexD. InA, meniscus is convex while in `B` it is concave
Answer» Correct Answer - B

Discussion

2.	The figure shows the variation of `V` with `i` at temperatures `T_(1)` and `T_(2)`. Then `T_(1)-T_(2)` is proportional to A. `tan2alpha`B. `tanalpha`C. `sinalpha`D. `cos2alpha`
Answer» Correct Answer - B

Discussion

3.	The angular dispersion produced by a prismA. increases if the average refractive index increasesB. increases if the avergae refractive index decreasesC. remains constant without depending on refractive indexD. no relation with average refractive index
Answer» Correct Answer - A

Discussion

4.	Change in temperatureA. increases forward resistanceB. decreases forward resistanceC. affects `v-i` characteristics of `p-n` junction diodeD. does not affect `v-i` characteristics of `p-n` junction diode.
Answer» Correct Answer - C

Discussion

5.	A converging lens is used to form an image on a screen. When the upper half of the lens is covered by an opaque screenA. half the image is not seenB. full image is seen with same intensityC. full image is seen with decreased intensityD. no image is observed
Answer» Correct Answer - C

Discussion

6.	Depth of a cylindrical vessel can be measured by using Vernier Callipers by the help ofA. thin metallic strip projecting at the backB. the lower pair of jawsC. the upper pair of jawsD. both lower and upper pairs of jaws
Answer» Correct Answer - A

Discussion

7.	Statement-1 : In a Meter Bridge experiment, null point for an unknown resistance is measured. Now, the unknown resistance is put inside an enclosure maintained at a higher temperature. The null point can be obtained at the same point as before by decreasing the value of the standard resistance. Statement-2 : Resistance of metal increases with increase in temperature.A. Statement-I is true, Statement-II is falseB. Statement-I is true, Statement-II is true, Statement-II is a correct explanation for Statement-IC. Statement-I is false, Statement-II is true, Statement-II is not a correct explanation for Statement-ID. Statement-I is false, Statement-II is true
Answer» Correct Answer - D

Discussion

8.	If a cooling curve is drawn taking `t(s)` along `X-"axis"` and temperature `(theta)` along `Y-"axis"`, it appers asA. B. C. D.
Answer» Correct Answer - D

Discussion

9.	The heat capacity of a body depends onA. the quantity of heat energy supplied to itB. rise in temperature of the bodyC. the mass of the bodyD. the material of the body
Answer» Correct Answer - C::D

Discussion

10.	When a stationary wave is formed then its frequency isA. same as that of the individual wavesB. twice that of individual waveC. half as that of an individual waveD. four times as that of an individual wave
Answer» Correct Answer - A

Discussion

11.	If heat a supplied to a solid, its temperatureA. must increaseB. may increaseC. may remain constantD. must decrease
Answer» Correct Answer - B::C

Discussion

12.	The change in speed of sound in a gas is independent of change isA. temperature of the gasB. pressure of the gasC. density of the gasD. both pressure and temperature
Answer» Correct Answer - B

Discussion

13.	Calorimeter usually is made of copper becauseA. it is cheaper and easily availableB. it does not get rustedC. its emissive power is moreD. its thermal conductivity is high
Answer» Correct Answer - D

Discussion

14.	The correct statement out of the following isA. both sound and light waves in air are transverseB. both sound and light waves in air are longitudinalC. sound waves in air are transverse and light waves in air are longitudinalD. sound waves in air are longitudinal and light waves in air are transverse.
Answer» Correct Answer - D

Discussion

15.	Consider two capillery tubes `A` and `B` with radii `r_(i)=r`, `r_(2)=(r )/(2)`. In which case liquid rise more?A. `A`B. `B`C. same levelD. data insufficent
Answer» Correct Answer - B

Discussion

16.	Viscosity is a transport phenomenon explained using the concept of transfer ofA. massB. kinetic energyC. potential energyD. momentum
Answer» Correct Answer - D

Discussion

17.	The viscous drag on a liquid layer does not depend onA. nature of the liquidB. velocity gradientC. velocityD. area
Answer» Correct Answer - A

Discussion

18.	Coefficent of viscosity `(eta)` of a gas vary with temperature (`T`) asA. `eta alpha sqrt(T)`B. `eta alpha T^(2)`C. `eta alpha (1)/(T^(2))`D. `eta alpha (1)/(sqrt(T))`
Answer» Correct Answer - A

Discussion

19.	A tuning fork is used as a source of standard frequency becauseA. it is `U`-shaped bodyB. it is made of a metalC. it has two symmetrical prongsD. it retains its frequency despite small changes in temperature
Answer» Correct Answer - D

Discussion

20.	The graph between time period (`T`) and length (`l`) of a simple pendulum isA. B. C. D.
Answer» Correct Answer - B

Discussion

21.	In an open end organ pipe of length `l` if the speed of sound is `V` then the fundamental frequency will beA. `(V)/(2l)` and both odd as well as even harmonics are presentB. `(V)/(4l)` & both odd as well as even harmonics are presentC. `(V)/(2l)` and only even harmonics are presentD. `(V)/(4l)` and only even harmonics are present
Answer» Correct Answer - A

Discussion

22.	If air is replaced by hydrogen in an organ pipe thenA. the fundamental frequency decreasesB. the fundamental frequency increasesC. the fundamental frequency remains sameD. stationary waves are not formed
Answer» Correct Answer - B

Discussion

23.	An open pipe is in resonance in its fundamental mode. Air, hydrogen and ethane are filled in succession in this pipe. The speed of sound is different in these three media on account of whichA. only the wavelength changesB. both frequency and wavelength changeC. only the frequency changesD. neither frequency nor wavelength changes
Answer» Correct Answer - C

Discussion

24.	There are two organ pipes of exactly the same length and material but of different radii. The frequencies of their fundamental notes are such thatA. wider pipe has lower frequencyB. narrow pipe has lower frequencyC. both will have the same frequencyD. both will have infinite frequency
Answer» Correct Answer - A

Discussion

25.	A lead sphere is dropped into a medium. As the sphere falls, the velocity of lead sphereA. remains constant throughoutB. decreases and finally becomes zeroC. decreases for some time and then becomes constantD. increases for some time and then decreases
Answer» Correct Answer - C

Discussion

26.	When a closed organ pipe of length `l` if the velocity of sound is `v` then the fundamental frequency will beA. `(V)/(4l)` and only even harmonics are presentB. `(V)/(2l)` and only odd harmonics are presentC. `(V)/(2l)` and even as well as odd harmonics are presentD. `(V)/(4l)` and only odd harmonics are present
Answer» Correct Answer - D

Discussion

27.	The graph plotted between acceleration and displacement of a particle in `SHM` isA. a straight lineB. a circleC. an ellipseD. a hyperbola
Answer» Correct Answer - A

Discussion

28.	A liquid flows through a horizontal tube of variable diameter. Then the pressure is lowest whereA. velocity is lowestB. velocity is highestC. diameter is largestD. both velocity and diameter are largest
Answer» Correct Answer - B

Discussion

29.	In laminar flow of fluid, the velocity of the fluid in contact with the walls of the tube isA. maximumB. between `0` and maximumC. equal to critical velocityD. zero
Answer» Correct Answer - D

Discussion

30.	With increases in temperature the frequency of sound in an organ pipeA. decreasesB. increasesC. remains sameD. becomes zero
Answer» Correct Answer - B

Discussion

31.	A steel ball falls slowly through water than through air becauseA. there is no surface tensionB. density of air is lowC. upthrust of air is lowD. viscosity of air is low
Answer» Correct Answer - D

Discussion

32.	When the temperature increases the viscosity ofA. increases & decreasesB. decreases & increasesC. increases & increasesD. decreases & decreases
Answer» Correct Answer - B

Discussion

33.	Two steel balls of radii `R_(1)` and `R_(2)(R_(1)gtR_(2))` are dropeed through a tube full of glcerine. Their terminal velocities are `v_(1)` and `v_(2)` in the experiment, thenA. `v_(1)=v_(2)`B. `v_(1)gtv_(2)`C. `v_(1) lt v_(2)`D. `v_(1)` and `v_(2)` are independent of `R_(1)` and `R_(2)`
Answer» Correct Answer - B

Discussion

34.	In the experiment to study relationship between temperture of the body and time if a graph is plotted between `log(theta-theta_(0))` taking it along `y-"axis"` and time `(t)` taking along `x-along`, it isA. exponentialB. straight lineC. parabolaD. hyperbola
Answer» Correct Answer - B

Discussion

35.	A liquid is flowing uniformly. The net external force causing the liquid to flow isA. equal to viscous forceB. more than viscous forceC. less than viscous forceD. not related to viscous force
Answer» Correct Answer - A

Discussion

36.	As difference of temperature of body and surroundings increases, rate of coolingA. increasesB. decreasesC. does not depend on itD. increases or decreases
Answer» Correct Answer - A

Discussion

37.	While drawing cooling curve between the temperature of hot water and time we should stir the water uniformly, this has been done to ensure thatA. temperature of water in the calorimeter is same at all placedB. cooling will occur fast to save the time of experimentsC. We can stir water non-uniformly alsoD. None of these
Answer» Correct Answer - A

Discussion

38.	In case of a forced vibration the resonance wave becomes very sharp when theA. damping force is smallB. restoring force is smallC. applied periodic force is smallD. quality factor is small
Answer» Correct Answer - A

Discussion

39.	The necessary and sufficient condition for simple harmonic motion isA. Constant periodB. Constant accelerationC. Proportionality between restoring force and displacement from equilibrium positionD. Acceleration is inversely proportional to displacement from equilibrium position
Answer» Correct Answer - C

Discussion

40.	In a screw guage, the value of one division on the linear scale is `1mm`, while the circular scale have `100` divisions. Without any object for measurement, while the screw touches the stud, the zero on circular scale advances `27` divisions beyond the references line. What is the type and amount of zero error?A. positive, `0.0.27 mm`B. negative, `0.27mm`C. positive, `0.27mm`D. negative, `0.027mm`
Answer» Correct Answer - B

Discussion

41.	For the given figure, calculate zero correctionA. `-0.02mm`B. `+0.02mm`C. `-0.03mm`D. `+0.03mm`
Answer» Correct Answer - C

Discussion

42.	A student measured the diameter of a wire using a screw gauge with least count `0.001cm` and listed the measurement. The correct measurement isA. `5.3 cm`B. `5.32 cm`C. `5.320 cm`D. `5.3200 cm`
Answer» Correct Answer - C

Discussion

43.	The load versus extension graph for four wires of same material is shown. The thinnest wire is represented by the line A. `OA`B. `OB`C. `OC`D. `OD`
Answer» Correct Answer - A

Discussion

44.	The maximum load that a wire can sustain is W. If the wire is cut to half its value, the maximum load it can sustain isA. `(W)/(4)`B. `(W)/(2)`C. `W`D. `2(W)`
Answer» Correct Answer - C

Discussion

45.	The time period of a simple pendulum oscillating in a freely falling lift isA. infinityB. zeroC. negativeD. `2 sec`.
Answer» Correct Answer - A

Discussion

46.	A simple pendulum is oscillating in a stationery lift. When the lift falls freely, the frequency of oscillations of the pendulum isA. zeroB. infinityC. unalteredD. negative
Answer» Correct Answer - A

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The figure shows the variation of `V` with `i` at temperatures `T_(1)` and `T_(2)`. Then `T_(1)-T_(2)` is proportional to A. `tan2alpha`B. `tanalpha`C. `sinalpha`D. `cos2alpha`

The angular dispersion produced by a prismA. increases if the average refractive index increasesB. increases if the avergae refractive index decreasesC. remains constant without depending on refractive indexD. no relation with average refractive index

Change in temperatureA. increases forward resistanceB. decreases forward resistanceC. affects `v-i` characteristics of `p-n` junction diodeD. does not affect `v-i` characteristics of `p-n` junction diode.

A converging lens is used to form an image on a screen. When the upper half of the lens is covered by an opaque screenA. half the image is not seenB. full image is seen with same intensityC. full image is seen with decreased intensityD. no image is observed

Depth of a cylindrical vessel can be measured by using Vernier Callipers by the help ofA. thin metallic strip projecting at the backB. the lower pair of jawsC. the upper pair of jawsD. both lower and upper pairs of jaws

If a cooling curve is drawn taking `t(s)` along `X-"axis"` and temperature `(theta)` along `Y-"axis"`, it appers asA. B. C. D.

The heat capacity of a body depends onA. the quantity of heat energy supplied to itB. rise in temperature of the bodyC. the mass of the bodyD. the material of the body

When a stationary wave is formed then its frequency isA. same as that of the individual wavesB. twice that of individual waveC. half as that of an individual waveD. four times as that of an individual wave

If heat a supplied to a solid, its temperatureA. must increaseB. may increaseC. may remain constantD. must decrease

The change in speed of sound in a gas is independent of change isA. temperature of the gasB. pressure of the gasC. density of the gasD. both pressure and temperature

Calorimeter usually is made of copper becauseA. it is cheaper and easily availableB. it does not get rustedC. its emissive power is moreD. its thermal conductivity is high

Consider two capillery tubes `A` and `B` with radii `r_(i)=r`, `r_(2)=(r )/(2)`. In which case liquid rise more?A. `A`B. `B`C. same levelD. data insufficent

Viscosity is a transport phenomenon explained using the concept of transfer ofA. massB. kinetic energyC. potential energyD. momentum

The viscous drag on a liquid layer does not depend onA. nature of the liquidB. velocity gradientC. velocityD. area

Coefficent of viscosity `(eta)` of a gas vary with temperature (`T`) asA. `eta alpha sqrt(T)`B. `eta alpha T^(2)`C. `eta alpha (1)/(T^(2))`D. `eta alpha (1)/(sqrt(T))`

A tuning fork is used as a source of standard frequency becauseA. it is `U`-shaped bodyB. it is made of a metalC. it has two symmetrical prongsD. it retains its frequency despite small changes in temperature

The graph between time period (`T`) and length (`l`) of a simple pendulum isA. B. C. D.

If air is replaced by hydrogen in an organ pipe thenA. the fundamental frequency decreasesB. the fundamental frequency increasesC. the fundamental frequency remains sameD. stationary waves are not formed

There are two organ pipes of exactly the same length and material but of different radii. The frequencies of their fundamental notes are such thatA. wider pipe has lower frequencyB. narrow pipe has lower frequencyC. both will have the same frequencyD. both will have infinite frequency

A lead sphere is dropped into a medium. As the sphere falls, the velocity of lead sphereA. remains constant throughoutB. decreases and finally becomes zeroC. decreases for some time and then becomes constantD. increases for some time and then decreases

The graph plotted between acceleration and displacement of a particle in `SHM` isA. a straight lineB. a circleC. an ellipseD. a hyperbola

A liquid flows through a horizontal tube of variable diameter. Then the pressure is lowest whereA. velocity is lowestB. velocity is highestC. diameter is largestD. both velocity and diameter are largest

In laminar flow of fluid, the velocity of the fluid in contact with the walls of the tube isA. maximumB. between `0` and maximumC. equal to critical velocityD. zero

With increases in temperature the frequency of sound in an organ pipeA. decreasesB. increasesC. remains sameD. becomes zero

A steel ball falls slowly through water than through air becauseA. there is no surface tensionB. density of air is lowC. upthrust of air is lowD. viscosity of air is low

When the temperature increases the viscosity ofA. increases & decreasesB. decreases & increasesC. increases & increasesD. decreases & decreases

Two steel balls of radii `R_(1)` and `R_(2)(R_(1)gtR_(2))` are dropeed through a tube full of glcerine. Their terminal velocities are `v_(1)` and `v_(2)` in the experiment, thenA. `v_(1)=v_(2)`B. `v_(1)gtv_(2)`C. `v_(1) lt v_(2)`D. `v_(1)` and `v_(2)` are independent of `R_(1)` and `R_(2)`

In the experiment to study relationship between temperture of the body and time if a graph is plotted between `log(theta-theta_(0))` taking it along `y-"axis"` and time `(t)` taking along `x-along`, it isA. exponentialB. straight lineC. parabolaD. hyperbola

A liquid is flowing uniformly. The net external force causing the liquid to flow isA. equal to viscous forceB. more than viscous forceC. less than viscous forceD. not related to viscous force

As difference of temperature of body and surroundings increases, rate of coolingA. increasesB. decreasesC. does not depend on itD. increases or decreases

In case of a forced vibration the resonance wave becomes very sharp when theA. damping force is smallB. restoring force is smallC. applied periodic force is smallD. quality factor is small

The necessary and sufficient condition for simple harmonic motion isA. Constant periodB. Constant accelerationC. Proportionality between restoring force and displacement from equilibrium positionD. Acceleration is inversely proportional to displacement from equilibrium position

For the given figure, calculate zero correctionA. `-0.02mm`B. `+0.02mm`C. `-0.03mm`D. `+0.03mm`

A student measured the diameter of a wire using a screw gauge with least count `0.001cm` and listed the measurement. The correct measurement isA. `5.3 cm`B. `5.32 cm`C. `5.320 cm`D. `5.3200 cm`

The load versus extension graph for four wires of same material is shown. The thinnest wire is represented by the line A. `OA`B. `OB`C. `OC`D. `OD`

The maximum load that a wire can sustain is W. If the wire is cut to half its value, the maximum load it can sustain isA. `(W)/(4)`B. `(W)/(2)`C. `W`D. `2(W)`

The time period of a simple pendulum oscillating in a freely falling lift isA. infinityB. zeroC. negativeD. `2 sec`.

A simple pendulum is oscillating in a stationery lift. When the lift falls freely, the frequency of oscillations of the pendulum isA. zeroB. infinityC. unalteredD. negative