13232 + Interview Questions in Physics Page 81 InterviewSolution

4001.	Two students made two circuits A and B to determine the resultant resistance of two resistors R1 and R2 connected in series:All the components have been connected correctly in:(1) circuit A only(2) circuit B only(3) both circuits A and B(4) neither of the two circuits
Answer» Two students made two circuits A and B to determine the resultant resistance of two resistors R₁ and R₂ connected in series: All the components have been connected correctly in: (1) circuit A only (2) circuit B only (3) both circuits A and B (4) neither of the two circuits

Discussion

4002.	Consider a straight, infinitely long, current carrying conductor lying on the z-axis. Which one of the following plots (in linear scale) qualitatively represents the dependence of Hϕ on r, where Hϕ is the magnitude of the azimuthal component of magnetic field outside the conductor and r is the radial distance from the conductor?
Answer» Consider a straight, infinitely long, current carrying conductor lying on the z-axis. Which one of the following plots (in linear scale) qualitatively represents the dependence of $H_{ϕ}$ on r, where $H_{ϕ}$ is the magnitude of the azimuthal component of magnetic field outside the conductor and r is the radial distance from the conductor?

Discussion

4003.	How sounds reach to our ears? What is the fluid inside cochlea?
Answer» How sounds reach to our ears? What is the fluid inside cochlea?

Discussion

4004.	Which of the following is a contact force:
Answer» Which of the following is a contact force:

Discussion

4005.	38.Two disc of same mass and same thickness have densities as 17g/cc and 51g/cc . The ratio of their MOI about their central axix is
Answer» 38.Two disc of same mass and same thickness have densities as 17g/cc and 51g/cc . The ratio of their MOI about their central axix is

Discussion

4006.	The time periods of revolution of Earth and Jupiter are in the ratio 1:12. Then the radii of Jupiter and Earth are in the ratio .
Answer» The time periods of revolution of Earth and Jupiter are in the ratio 1:12. Then the radii of Jupiter and Earth are in the ratio .

Discussion

4007.	Find the incorrect match.(1)Electron Dual nature (2)Rainbow Continuous spectra (3)Atoms Particle nature (4)Particle nature Photoelectric effect
Answer» Find the incorrect match. (1) Electron Dual nature (2) Rainbow Continuous spectra (3) Atoms Particle nature (4) Particle nature Photoelectric effect

Discussion

4008.	94. A car is running at 25km/h can be brought to rest by applying brakes in a distance of 0.5m . If the same car is running at 75km/h . How far will it go before coming to rest , if the braking force remains the same ?
Answer» 94. A car is running at 25km/h can be brought to rest by applying brakes in a distance of 0.5m . If the same car is running at 75km/h . How far will it go before coming to rest , if the braking force remains the same ?

Discussion

4009.	initially mass m is held such that spring is in relaxed condition .if the mass m is brought down slowly ,then maximum elongation in spring will be
Answer» initially mass m is held such that spring is in relaxed condition .if the mass m is brought down slowly ,then maximum elongation in spring will be

Discussion

4010.	Express each of the following in m/s. (a) 1 km h−1 (b) 18 km min−1
Answer» Express each of the following in m/s. (a) 1 km $h^{- 1}$ (b) 18 km $m i n^{- 1}$

4010.

Express each of the following in m/s. (a) 1 km h−1 (b) 18 km min−1

Answer»

Express each of the following in m/s.

(a) 1 km $h^{- 1}$ (b) 18 km $m i n^{- 1}$

Discussion

4011.	The cochlea of the ear converts pressure variations of the air into _________.
Answer» The cochlea of the ear converts pressure variations of the air into _________.

Discussion

4012.	Why does the current flow in a closed circuit, but doesn’t flow in an open circuit?
Answer» Why does the current flow in a closed circuit, but doesn’t flow in an open circuit?

Discussion

4013.	Question 18What is the function of an earth wire? Why is it necessary to earth metallic appliances?
Answer» Question 18 What is the function of an earth wire? Why is it necessary to earth metallic appliances?

Discussion

4014.	A flask containing 10g of a Gas relative molecular mass 100 at a pressure of 100kPa was evacuated to a pressure of 0.01 kPa at constant temperature. Which one of the following is the best estimate of the number of molecules left in the flask?
Answer» A flask containing 10g of a Gas relative molecular mass 100 at a pressure of 100kPa was evacuated to a pressure of 0.01 kPa at constant temperature. Which one of the following is the best estimate of the number of molecules left in the flask?

Discussion

4015.	The sun (diameter d) subtends an angle θ radian at the pole of a concave mirror of focal length f. The diameter of the image of sun formed by mirror is
Answer» The sun (diameter d) subtends an angle $θ$ radian at the pole of a concave mirror of focal length f. The diameter of the image of sun formed by mirror is

Discussion

4016.	On rubbing glass rod with silk, the magnitude of charges on glass rod and silk are in ratio :
Answer» On rubbing glass rod with silk, the magnitude of charges on glass rod and silk are in ratio :

Discussion

4017.	prove vis equal touplus at by dimension method
Answer» prove vis equal touplus at by dimension method

Discussion

4018.	A body dropped from a tower covers 25m in the last second of its fall. Then, the height of tower is [ take g= 10 m/s^2] (1) 45m (2) 20m (3) 40m (4) 50m
Answer» A body dropped from a tower covers 25m in the last second of its fall. Then, the height of tower is [ take g= 10 m/s^2] (1) 45m (2) 20m (3) 40m (4) 50m

4018.

A body dropped from a tower covers 25m in the last second of its fall. Then, the height of tower is [ take g= 10 m/s^2] (1) 45m (2) 20m (3) 40m (4) 50m

Answer»

A body dropped from a tower covers 25m in the last second of its fall. Then, the height of tower is [ take g= 10 m/s^2]

(1) 45m (2) 20m (3) 40m (4) 50m

Discussion

4019.	does sound travels in vaccum
Answer» does sound travels in vaccum

Discussion

4020.	Describe the motion of a charged particle in a cyclotron if the frequency of the radio frequency (rf) field were doubled.
Answer» Describe the motion of a charged particle in a cyclotron if the frequency of the radio frequency (rf) field were doubled.

Discussion

4021.	An object is placed at 20 m in front of a concave mirror. If its radius of curvature is 40 m, then the image distance is equal to ___ m.
Answer» An object is placed at 20 m in front of a concave mirror. If its radius of curvature is 40 m, then the image distance is equal to ___ m.

Discussion

4022.	potential energy of a 3kg body at the surface of a planet is -54J,then escape velocity will be
Answer» potential energy of a 3kg body at the surface of a planet is -54J,then escape velocity will be

Discussion

4023.	Define the following terms in relation to a wave : (a) amplitude, (b) frequency, (c) wavelength, and (d) wave velocity.
Answer» Define the following terms in relation to a wave : (a) amplitude, (b) frequency, (c) wavelength, and (d) wave velocity.

4023.

Define the following terms in relation to a wave : (a) amplitude, (b) frequency, (c) wavelength, and (d) wave velocity.

Answer»

Define the following terms in relation to a wave :

(a) amplitude, (b) frequency, (c) wavelength, and (d) wave velocity.

Discussion

4024.	Express 1 kg 800 g 600 mg in kilograms in the form of decimal number.
Answer» Express $1$ kg $800$ g $600$ mg in kilograms in the form of decimal number.

Discussion

4025.	38. If specific heat of a metal is 0.9 Cal/g, then it's atomic mass will be approximately equal to_______?
Answer» 38. If specific heat of a metal is 0.9 Cal/g, then it's atomic mass will be approximately equal to_______?

Discussion

4026.	the total mechanical energy of an object of mass m projected from surface of earth with escape speed i
Answer» the total mechanical energy of an object of mass m projected from surface of earth with escape speed i

Discussion

4027.	Floating and sinking of an object depends on:
Answer» Floating and sinking of an object depends on:

Discussion

4028.	an object thrown vertically up from the ground passes the height 5m twice in an interval of10 seconds.what is its time of flight?
Answer» an object thrown vertically up from the ground passes the height 5m twice in an interval of10 seconds.what is its time of flight?

Discussion

4029.	For the circuit given the current through 4 Ω resistor and the potential difference VA−VB respectively are:
Answer» For the circuit given the current through $4 Ω$ resistor and the potential difference $V_{A} - V_{B}$ respectively are:

Discussion

4030.	A small drop of water falls from rest through a large height h in air , the final velocity is 1) proportional to\sqrt h 2)proportional to h 3) Inversely proportional to h 4) almost independent of
Answer» A small drop of water falls from rest through a large height h in air , the final velocity is 1) proportional to\sqrt h 2)proportional to h 3) Inversely proportional to h 4) almost independent of

Discussion

4031.	An I-section is subjected to a sagging moment (M) at 60o from y-axis as shown below:The equation of neutral axis is given by
Answer» An I-section is subjected to a sagging moment (M) at $60^{o}$ from y-axis as shown below: The equation of neutral axis is given by

Discussion

4032.	For which range of frequencies, human ears are most sensitive ?
Answer» For which range of frequencies, human ears are most sensitive ?

Discussion

4033.	a particle at rest ,falls under gravity such that it travels 53.9m in last second of its journey total time for fall is
Answer» a particle at rest ,falls under gravity such that it travels 53.9m in last second of its journey total time for fall is

Discussion

4034.	What is the frequency of car horn?
Answer» What is the frequency of car horn?

Discussion

4035.	A 2150 kg truck is travelling along a straight level road at a constant speed of 55 km/hr. Then the driver removes his foot from the accelerator. After 20 sec, the truck speed is 33 km/hr. What is the magnitude of the average net force acting on the truck during the 20 sec interval?
Answer» A 2150 kg truck is travelling along a straight level road at a constant speed of 55 km/hr. Then the driver removes his foot from the accelerator. After 20 sec, the truck speed is 33 km/hr. What is the magnitude of the average net force acting on the truck during the 20 sec interval?

Discussion

4036.	The value of g at a particular point is 10 m/s2. Suppose the earth shrinks uniformly to half of its present size without losing any mass. The value of g at the same point (assuming that the distance of the point from the centre of the earth does not change) will now be
Answer» The value of $g$ at a particular point is $10 {m/s}^{2}$ . Suppose the earth shrinks uniformly to half of its present size without losing any mass. The value of $g$ at the same point (assuming that the distance of the point from the centre of the earth does not change) will now be

Discussion

4037.	A stone of 1 kg is thrown with a velocity of 20 ms−1 across the frozen surface of a lake and comes to rest after travelling a distance of 50 m. What is the force of friction between the stone and the ice?
Answer» A stone of 1 kg is thrown with a velocity of $20 m s^{- 1}$ across the frozen surface of a lake and comes to rest after travelling a distance of 50 m. What is the force of friction between the stone and the ice?

Discussion

4038.	If the displacement of an object is proportional to the square of time, then the object is moving with : (a) uniform velocity (b) uniform acceleration (c) increasing acceleration (d) decreasing acceleration
Answer» If the displacement of an object is proportional to the square of time, then the object is moving with : (a) uniform velocity (b) uniform acceleration (c) increasing acceleration (d) decreasing acceleration

4038.

If the displacement of an object is proportional to the square of time, then the object is moving with : (a) uniform velocity (b) uniform acceleration (c) increasing acceleration (d) decreasing acceleration

Answer»

If the displacement of an object is proportional to the square of time, then the object is moving with :

(a) uniform velocity

(b) uniform acceleration

(c) increasing acceleration

(d) decreasing acceleration

Discussion

4039.	The distance between the first and third crests in a sinusoidal wave is 20 cm. If the source produces 10 waves in 1 s, then the velocity of the wave is
Answer» The distance between the first and third crests in a sinusoidal wave is 20 cm. If the source produces 10 waves in 1 s, then the velocity of the wave is

Discussion

4040.	A sound source sends waves of 400 Hz. In a medium, this sound has a wavelength of 2.5 m. Find the speed of sound waves in the medium.
Answer» A sound source sends waves of 400 Hz. In a medium, this sound has a wavelength of 2.5 m. Find the speed of sound waves in the medium.

Discussion

4041.	Was proton discovered by Eugen Goldstein or Rutherford?
Answer» Was proton discovered by Eugen Goldstein or Rutherford?

Discussion

4042.	28. What's the hybridisation and shape of Wilkinson's catalyst
Answer» 28. What's the hybridisation and shape of Wilkinson's catalyst

Discussion

4043.	State the function of the following in an electric circuit and draw their symbols.(i) Switch or Key(ii) Cell
Answer» State the function of the following in an electric circuit and draw their symbols. (i) Switch or Key (ii) Cell

Discussion

4044.	If c is the speed of light in vacuum and v is the speed of light in the given medium, the absolute refractive index(n) of a medium is given as .
Answer» If c is the speed of light in vacuum and v is the speed of light in the given medium, the absolute refractive index(n) of a medium is given as .

Discussion

4045.	A ball is dropped from the top of a building and simultaneously, another ball is projected vertically upward from the ground with a velocity of 25 m/s. If the initial distance between these balls is 100 m. Calculate where the two balls will meet above the ground.(Take g = 10 m/s2 )
Answer» A ball is dropped from the top of a building and simultaneously, another ball is projected vertically upward from the ground with a velocity of $25 m / s$ . If the initial distance between these balls is $100 m$ . Calculate where the two balls will meet above the ground. (Take g = $10 m / s^{2}$ )

Discussion

4046.	A pump can lift water of 150 kg in 15 s, to store it in an overhead tank at a height of 15 m. Find the power of the pump. (g=9.8 ms−2)
Answer» A pump can lift water of 150 kg in 15 s, to store it in an overhead tank at a height of 15 m. Find the power of the pump. $(g = 9.8 m s^{- 2})$

Discussion

4047.	If a bag of rice weighs 30 kg on Earth, what is the weight of the rice bag on the planet Neptune? Take the mass of Neptune to be 1026 kg, and its radius to be 25×106 m.
Answer» If a bag of rice weighs $30 kg$ on Earth, what is the weight of the rice bag on the planet Neptune? Take the mass of Neptune to be $10^{26} kg$ , and its radius to be $25 \times 10^{6} m$ .

Discussion

4048.	starting from rest a particle moves in a straight line with acceleration. a=\{2+\vert t-2\vert\} m/s^2 . then velocity of particle at the end of 4s will be 1) 0 m/s 2) 6m/s 3) 12m/s 4) 18m/
Answer» starting from rest a particle moves in a straight line with acceleration. a=\{2+\vert t-2\vert\} m/s^2 . then velocity of particle at the end of 4s will be 1) 0 m/s 2) 6m/s 3) 12m/s 4) 18m/

Discussion

4049.	Question 8 Four cars A, B, C and D are moving on a leveled road. Their distance versus time graphs are shown in Given figure: Choose the correct statement (a) Car A is faster than car D. (b) Car B is the slowest. (c) Car D is faster than car C. (d) Car C is the slowest.
Answer» Question 8 Four cars A, B, C and D are moving on a leveled road. Their distance versus time graphs are shown in Given figure: Choose the correct statement (a) Car A is faster than car D. (b) Car B is the slowest. (c) Car D is faster than car C. (d) Car C is the slowest.

Discussion

4050.	A body starting from A with initial velocity u moves a dis†an ce x with uniform acceleration & attains final velocity v at B . The velocity at x/2 and time at t/2 are ?
Answer» A body starting from A with initial velocity u moves a dis†an ce x with uniform acceleration & attains final velocity v at B . The velocity at x/2 and time at t/2 are ?

Discussion

Explore topic-wise InterviewSolutions in .

Two students made two circuits A and B to determine the resultant resistance of two resistors R1 and R2 connected in series:All the components have been connected correctly in:(1) circuit A only(2) circuit B only(3) both circuits A and B(4) neither of the two circuits

How sounds reach to our ears? What is the fluid inside cochlea?

Which of the following is a contact force:

38.Two disc of same mass and same thickness have densities as 17g/cc and 51g/cc . The ratio of their MOI about their central axix is

The time periods of revolution of Earth and Jupiter are in the ratio 1:12. Then the radii of Jupiter and Earth are in the ratio .

Find the incorrect match.(1)Electron Dual nature (2)Rainbow Continuous spectra (3)Atoms Particle nature (4)Particle nature Photoelectric effect

94. A car is running at 25km/h can be brought to rest by applying brakes in a distance of 0.5m . If the same car is running at 75km/h . How far will it go before coming to rest , if the braking force remains the same ?

initially mass m is held such that spring is in relaxed condition .if the mass m is brought down slowly ,then maximum elongation in spring will be

Express each of the following in m/s. (a) 1 km h−1 (b) 18 km min−1

The cochlea of the ear converts pressure variations of the air into _________.

Why does the current flow in a closed circuit, but doesn’t flow in an open circuit?

Question 18What is the function of an earth wire? Why is it necessary to earth metallic appliances?

A flask containing 10g of a Gas relative molecular mass 100 at a pressure of 100kPa was evacuated to a pressure of 0.01 kPa at constant temperature. Which one of the following is the best estimate of the number of molecules left in the flask?

The sun (diameter d) subtends an angle θ radian at the pole of a concave mirror of focal length f. The diameter of the image of sun formed by mirror is

On rubbing glass rod with silk, the magnitude of charges on glass rod and silk are in ratio :

prove vis equal touplus at by dimension method

A body dropped from a tower covers 25m in the last second of its fall. Then, the height of tower is [ take g= 10 m/s^2] (1) 45m (2) 20m (3) 40m (4) 50m

does sound travels in vaccum

Describe the motion of a charged particle in a cyclotron if the frequency of the radio frequency (rf) field were doubled.

An object is placed at 20 m in front of a concave mirror. If its radius of curvature is 40 m, then the image distance is equal to ___ m.

potential energy of a 3kg body at the surface of a planet is -54J,then escape velocity will be

Define the following terms in relation to a wave : (a) amplitude, (b) frequency, (c) wavelength, and (d) wave velocity.

Express 1 kg 800 g 600 mg in kilograms in the form of decimal number.

38. If specific heat of a metal is 0.9 Cal/g, then it's atomic mass will be approximately equal to_______?

the total mechanical energy of an object of mass m projected from surface of earth with escape speed i

Floating and sinking of an object depends on:

an object thrown vertically up from the ground passes the height 5m twice in an interval of10 seconds.what is its time of flight?

For the circuit given the current through 4 Ω resistor and the potential difference VA−VB respectively are:

A small drop of water falls from rest through a large height h in air , the final velocity is 1) proportional to\sqrt h 2)proportional to h 3) Inversely proportional to h 4) almost independent of

An I-section is subjected to a sagging moment (M) at 60o from y-axis as shown below:The equation of neutral axis is given by

For which range of frequencies, human ears are most sensitive ?

a particle at rest ,falls under gravity such that it travels 53.9m in last second of its journey total time for fall is

What is the frequency of car horn?

A 2150 kg truck is travelling along a straight level road at a constant speed of 55 km/hr. Then the driver removes his foot from the accelerator. After 20 sec, the truck speed is 33 km/hr. What is the magnitude of the average net force acting on the truck during the 20 sec interval?

The value of g at a particular point is 10 m/s2. Suppose the earth shrinks uniformly to half of its present size without losing any mass. The value of g at the same point (assuming that the distance of the point from the centre of the earth does not change) will now be

A stone of 1 kg is thrown with a velocity of 20 ms−1 across the frozen surface of a lake and comes to rest after travelling a distance of 50 m. What is the force of friction between the stone and the ice?

If the displacement of an object is proportional to the square of time, then the object is moving with : (a) uniform velocity (b) uniform acceleration (c) increasing acceleration (d) decreasing acceleration

The distance between the first and third crests in a sinusoidal wave is 20 cm. If the source produces 10 waves in 1 s, then the velocity of the wave is

A sound source sends waves of 400 Hz. In a medium, this sound has a wavelength of 2.5 m. Find the speed of sound waves in the medium.

Was proton discovered by Eugen Goldstein or Rutherford?

28. What's the hybridisation and shape of Wilkinson's catalyst

State the function of the following in an electric circuit and draw their symbols.(i) Switch or Key(ii) Cell

If c is the speed of light in vacuum and v is the speed of light in the given medium, the absolute refractive index(n) of a medium is given as .

A ball is dropped from the top of a building and simultaneously, another ball is projected vertically upward from the ground with a velocity of 25 m/s. If the initial distance between these balls is 100 m. Calculate where the two balls will meet above the ground.(Take g = 10 m/s2 )

A pump can lift water of 150 kg in 15 s, to store it in an overhead tank at a height of 15 m. Find the power of the pump. (g=9.8 ms−2)

If a bag of rice weighs 30 kg on Earth, what is the weight of the rice bag on the planet Neptune? Take the mass of Neptune to be 1026 kg, and its radius to be 25×106 m.

starting from rest a particle moves in a straight line with acceleration. a=\{2+\vert t-2\vert\} m/s^2 . then velocity of particle at the end of 4s will be 1) 0 m/s 2) 6m/s 3) 12m/s 4) 18m/

Question 8 Four cars A, B, C and D are moving on a leveled road. Their distance versus time graphs are shown in Given figure: Choose the correct statement (a) Car A is faster than car D. (b) Car B is the slowest. (c) Car D is faster than car C. (d) Car C is the slowest.

A body starting from A with initial velocity u moves a dis†an ce x with uniform acceleration & attains final velocity v at B . The velocity at x/2 and time at t/2 are ?