13232 + Interview Questions in Physics

1.	Two objects of masses 8 kg and 25 kg which one has more inertia why ?
Answer» Two objects of masses 8 kg and 25 kg which one has more inertia why ?

Discussion

2.	Why our voice echos in an empty room but doesn't echo in a room filled with lots of furniture and other things ?
Answer» Why our voice echos in an empty room but doesn't echo in a room filled with lots of furniture and other things ?

Discussion

3.	A car moving with the speed 50 km/ he can be stopped by brakes after at least 6m. If the same car is moving with the speed of 100 km/hr the minimum stopping distance is
Answer» A car moving with the speed 50 km/ he can be stopped by brakes after at least 6m. If the same car is moving with the speed of 100 km/hr the minimum stopping distance is

Discussion

4.	Which property of sound is used in Stethoscope? __
Answer» Which property of sound is used in Stethoscope? __

Discussion

5.	A wave transports energy and not matter. Justify this statement
Answer» A wave transports energy and not matter. Justify this statement

Discussion

6.	How much current will an electric geyser draw from a 220V source, if the resistance of the geyser is 110Ω?
Answer» How much current will an electric geyser draw from a $220 V$ source, if the resistance of the geyser is $110 Ω$ ?

Discussion

7.	Gravitational force between a point mass m and M separated by a distance F. Now if a point mass 2m is placed next to m in contact with it, the force on M due to m and the total force on M are ?
Answer» Gravitational force between a point mass m and M separated by a distance F. Now if a point mass 2m is placed next to m in contact with it, the force on M due to m and the total force on M are ?

Discussion

8.	A scooter acquires a velocity of 36km/h in 10 seconds just after the start.calculate the acceleration of the car.
Answer» A scooter acquires a velocity of 36km/h in 10 seconds just after the start.calculate the acceleration of the car.

Discussion

9.	If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be
Answer» If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be

Discussion

10.	With what speed in mileshr must an object be thrown vertically upwards to reach a height of 91.5 m? (Take a=9.8m/s2)
Answer» With what speed in $\frac{m i l e s}{h r}$ must an object be thrown vertically upwards to reach a height of 91.5 m? (Take $a = 9.8 m / s^{2}$ )

Discussion

11.	How does the speed of sound in air vary with temperature ?
Answer» How does the speed of sound in air vary with temperature ?

Discussion

12.	In the figure shown below, current is flowing in the anticlockwise direction in a loop of wire. The part of the loop that faces towards you is ___ pole.
Answer» In the figure shown below, current is flowing in the anticlockwise direction in a loop of wire. The part of the loop that faces towards you is ___ pole.

Discussion

13.	The persistence of audible sound due to the successive reflections from the surrounding objects even after the source has stopped to produce that sound is called
Answer» The persistence of audible sound due to the successive reflections from the surrounding objects even after the source has stopped to produce that sound is called

Discussion

14.	How many watts equal one horse power ?
Answer» How many watts equal one horse power ?

Discussion

15.	A water tanker filled up to 23rd of its height is moving with a uniform speed. On sudden application of the brake, the water in the tank would
Answer» A water tanker filled up to $\frac{2}{3}$ rd of its height is moving with a uniform speed. On sudden application of the brake, the water in the tank would

15.

A water tanker filled up to 23rd of its height is moving with a uniform speed. On sudden application of the brake, the water in the tank would

Answer»

A water tanker filled up to $\frac{2}{3}$ rd of its height is moving with a uniform speed. On sudden application of the brake, the water in the tank would

Discussion

16.	is power=work/time or power= energy/time or both then how it is true?
Answer» is power=work/time or power= energy/time or both then how it is true?

16.

is power=work/time or power= energy/time or both then how it is true?

Answer»

is

power=work/time

or

power= energy/time

or both then how it is true?

Discussion

17.	5 Difference between mass and charge
Answer» 5 Difference between mass and charge

Discussion

18.	An insect moves along a circular path of radius 10 centimetre with a constant speed. It takes one minute to move from a point on the path to a diametrically opposite point. Find- A. the distance covered. B. The displacement C. The average velocity
Answer» An insect moves along a circular path of radius 10 centimetre with a constant speed. It takes one minute to move from a point on the path to a diametrically opposite point. Find- A. the distance covered. B. The displacement C. The average velocity

Discussion

19.	Two objects, each of mass 1.5 kg are moving in the same straight line but in opposite directions. The velocity of each object is 2.5ms−1 before the collision during which they stick together. What will be the velocity of the combined object after collision?
Answer» Two objects, each of mass 1.5 kg are moving in the same straight line but in opposite directions. The velocity of each object is 2.5ms−1 before the collision during which they stick together. What will be the velocity of the combined object after collision?

Discussion

20.	A periscope is used for:
Answer» A periscope is used for:

Discussion

21.	Complete the following sentences: (a) The kinetic energy of a body is the energy by virtue of its.......................... (b) The potential energy of a body is the energy by virtue of its..........................
Answer» Complete the following sentences: (a) The kinetic energy of a body is the energy by virtue of its.......................... (b) The potential energy of a body is the energy by virtue of its..........................

21.

Complete the following sentences: (a) The kinetic energy of a body is the energy by virtue of its.......................... (b) The potential energy of a body is the energy by virtue of its..........................

Answer»

Complete the following sentences:

(a) The kinetic energy of a body is the energy by virtue of its..........................

(b) The potential energy of a body is the energy by virtue of its..........................

Discussion

22.	A parachutist jumps from a height of 5000 m. The relationship between his falling speed, v and the distance fallen through, d is best represented as
Answer» A parachutist jumps from a height of 5000 m. The relationship between his falling speed, v and the distance fallen through, d is best represented as

Discussion

23.	Two objects of equal masses have the velocities 2 m/s and 3 m/s respectively. Find out the ratio of their kinetic energies respectively.
Answer» Two objects of equal masses have the velocities $2 m / s$ and $3 m / s$ respectively. Find out the ratio of their kinetic energies respectively.

Discussion

24.	A solid object of relative density 1.25 is found to weigh 12g in water. Find its weight in air.
Answer» A solid object of relative density 1.25 is found to weigh 12g in water. Find its weight in air.

Discussion

25.	Why do we fall sideways when the bus takes a sharp turn?
Answer» Why do we fall sideways when the bus takes a sharp turn?

Discussion

26.	A fruit is dropped from a height of 20 m. Find the velocity with which it would hit the ground.
Answer» A fruit is dropped from a height of 20 m. Find the velocity with which it would hit the ground.

Discussion

27.	A ray through the center of curvature hitting the spherical mirror, after reflection makes an angle of ____ with the normal.
Answer» A ray through the center of curvature hitting the spherical mirror, after reflection makes an angle of ____ with the normal.

Discussion

28.	SONAR stands for ___.
Answer» SONAR stands for ___.

Discussion

29.	Amount of energy transferred from one trophic level to next is :
Answer» Amount of energy transferred from one trophic level to next is :

Discussion

30.	A 60 kg skydiver moving at terminal speed covers 40 m in 2 seconds. The skydiver is spending a power of ___ KW.
Answer» A 60 kg skydiver moving at terminal speed covers 40 m in 2 seconds. The skydiver is spending a power of ___ KW.

Discussion

31.	An observer sitting in line of two tanks, watches the flashes of two tanks firing at each other at the same time, but he hears the sounds of two shots 2 s and 3 - 5 a after seeing the flashes. If distance between the two tanks is 510 m, find the speed of sound.
Answer» An observer sitting in line of two tanks, watches the flashes of two tanks firing at each other at the same time, but he hears the sounds of two shots 2 s and 3 - 5 a after seeing the flashes. If distance between the two tanks is 510 m, find the speed of sound.

Discussion

32.	Shishir was playing with a spring. He was compressing and releasing it. Suddenly he noticed that a ball, when kept on a spring, attains a certain height after it is compressed and released. In which of the following heights attained by the ball, Shishir has to spend the maximum of his energy?
Answer» Shishir was playing with a spring. He was compressing and releasing it. Suddenly he noticed that a ball, when kept on a spring, attains a certain height after it is compressed and released. In which of the following heights attained by the ball, Shishir has to spend the maximum of his energy?

Discussion

33.	Galvanic cell converts chemical energy into
Answer» Galvanic cell converts chemical energy into

Discussion

34.	Water flows through a horizontal tube as shown in figure. If the difference of heights of water column in the vertical tubes is 2 cm, and the areas of cross section at A and B are 4 cm2 and 2 cm2 respectively, find the rate of flow of water across any section. Given √215=0.365 approx.
Answer» Water flows through a horizontal tube as shown in figure. If the difference of heights of water column in the vertical tubes is 2 cm, and the areas of cross section at A and B are 4 cm² and 2 cm² respectively, find the rate of flow of water across any section. Given $\sqrt{\frac{2}{15}} = 0.365$ approx.

34.

Water flows through a horizontal tube as shown in figure. If the difference of heights of water column in the vertical tubes is 2 cm, and the areas of cross section at A and B are 4 cm2 and 2 cm2 respectively, find the rate of flow of water across any section. Given √215=0.365 approx.

Answer»

Water flows through a horizontal tube as shown in figure. If the difference of heights of water column in the vertical tubes is 2 cm, and the areas of cross section at A and B are 4 cm² and 2 cm² respectively, find the rate of flow of water across any section. Given $\sqrt{\frac{2}{15}} = 0.365$
approx.

Discussion

35.	20 derive the second equation of motion S is equal to UT Plus 1/2 at 2 numerically
Answer» 20 derive the second equation of motion S is equal to UT Plus 1/2 at 2 numerically

Discussion

36.	Fill in the following blanks with suitable words : (a) Work is measured as a product of ....................... and .................. (b) The work done on a body moving in a circular path is ..................... (c) 1 joule is the work done when a force of one ............. moves an object through a distance of one.................. in the direction of ..................... (d) The ability of a body to do work is called .................... The ability of a body to do work because of its motion is called ................. (e) The sum of the potential and kinetic energies of a body is called ......... energy.
Answer» Fill in the following blanks with suitable words : (a) Work is measured as a product of ....................... and .................. (b) The work done on a body moving in a circular path is ..................... (c) 1 joule is the work done when a force of one ............. moves an object through a distance of one.................. in the direction of ..................... (d) The ability of a body to do work is called .................... The ability of a body to do work because of its motion is called ................. (e) The sum of the potential and kinetic energies of a body is called ......... energy.

36.

Fill in the following blanks with suitable words : (a) Work is measured as a product of ....................... and .................. (b) The work done on a body moving in a circular path is ..................... (c) 1 joule is the work done when a force of one ............. moves an object through a distance of one.................. in the direction of ..................... (d) The ability of a body to do work is called .................... The ability of a body to do work because of its motion is called ................. (e) The sum of the potential and kinetic energies of a body is called ......... energy.

Answer»

Fill in the following blanks with suitable words :

(a) Work is measured as a product of ....................... and ..................

(b) The work done on a body moving in a circular path is .....................

(c) 1 joule is the work done when a force of one ............. moves an object through a distance of one.................. in the direction of .....................

(d) The ability of a body to do work is called .................... The ability of a body to do work because of its motion is called .................

(e) The sum of the potential and kinetic energies of a body is called ......... energy.

Discussion

37.	In an experiment, Anhad studies sound waves. He sets up a loudspeaker to produce sound as shown below : Anhad adjusts the signal to the loudspeaker to give a sound of frequency 200 Hz. (a) What happens to the air in-between Anhad and the loudspeaker ? (b) Explain how Anhad receives sound in both ears.
Answer» In an experiment, Anhad studies sound waves. He sets up a loudspeaker to produce sound as shown below : Anhad adjusts the signal to the loudspeaker to give a sound of frequency 200 Hz. (a) What happens to the air in-between Anhad and the loudspeaker ? (b) Explain how Anhad receives sound in both ears.

37.

In an experiment, Anhad studies sound waves. He sets up a loudspeaker to produce sound as shown below : Anhad adjusts the signal to the loudspeaker to give a sound of frequency 200 Hz. (a) What happens to the air in-between Anhad and the loudspeaker ? (b) Explain how Anhad receives sound in both ears.

Answer»

In an experiment, Anhad studies sound waves. He sets up a loudspeaker to produce sound as shown below :

Anhad adjusts the signal to the loudspeaker to give a sound of frequency 200 Hz.

(a) What happens to the air in-between Anhad and the loudspeaker ?

(b) Explain how Anhad receives sound in both ears.

Discussion

38.	What is velocity?
Answer» What is velocity?

Discussion

39.	In the above 3 figures, the arrows indicate the direction of force and the magnitude of force is written above/below the arrows. Which box is experiencing balanced force?
Answer» In the above 3 figures, the arrows indicate the direction of force and the magnitude of force is written above/below the arrows. Which box is experiencing balanced force?

39.

In the above 3 figures, the arrows indicate the direction of force and the magnitude of force is written above/below the arrows. Which box is experiencing balanced force?

Answer»

In the above 3 figures, the arrows indicate the direction of force and the magnitude of force is written above/below the arrows.

Which box is experiencing balanced force?

Discussion

40.	A uniform magnetic field exists in the plane of a paper pointing from left to right as shown in Figure. The electron and the proton in the field experiences a force:
Answer» A uniform magnetic field exists in the plane of a paper pointing from left to right as shown in Figure. The electron and the proton in the field experiences a force:

40.

A uniform magnetic field exists in the plane of a paper pointing from left to right as shown in Figure. The electron and the proton in the field experiences a force:

Answer»

A uniform magnetic field exists in the plane of a paper pointing from left to right as shown in Figure. The electron and the proton in the field experiences a force:

Discussion

41.	Tractor is pulling a trolley. Whether work is done or not? [1 MARKS]
Answer» Tractor is pulling a trolley. Whether work is done or not? [1 MARKS]

Discussion

42.	What is magnitude ? a constant force acts on an object of 5 kg for a period of 10 seconds. If it increases the velocity of an object from 3 metre per second in 7 minutes per second. find the magnitude of the applied force . Now the force be applied for a period of 5 seconds, what would be the final velocity of the object ? briefly explain what's the magnitude and how we can find it at the chapter we can briefly have the knowledge of this magnitude
Answer» What is magnitude ? a constant force acts on an object of 5 kg for a period of 10 seconds. If it increases the velocity of an object from 3 metre per second in 7 minutes per second. find the magnitude of the applied force . Now the force be applied for a period of 5 seconds, what would be the final velocity of the object ? briefly explain what's the magnitude and how we can find it at the chapter we can briefly have the knowledge of this magnitude

Discussion

43.	300 g of coconut oil at 50∘C is mixed with 500 g kerosene at 10∘C. Determine the temperature of the mixture. (Specific heat of coconut oil = 2100 J kg−1 K−1 and specific heat of kerosene = 2000 J kg−1 K−1.
Answer» $300 g$ of coconut oil at $50^{\circ} C$ is mixed with $500 g$ kerosene at $10^{\circ} C$ . Determine the temperature of the mixture. (Specific heat of coconut oil = $2100 J k g^{- 1} K^{- 1}$ and specific heat of kerosene = $2000 J k g^{- 1} K^{- 1}$ .

Discussion

44.	Ratio of heat energy required to change in states of 100 g of water at 100∘C to steam to 540 g of ice to water respectively is 5:y then y = ___ Take latent heat of fusion 80 cal/gm and latent heat of vaporization as 540 cal/gm
Answer» Ratio of heat energy required to change in states of $100 g$ of water at $100^{\circ} C$ to steam to $540 g$ of ice to water respectively is $5 : y$ then $y$ = ___ Take latent heat of fusion $80 c a l / g m$ and latent heat of vaporization as $540 c a l / g m$

44.

Ratio of heat energy required to change in states of 100 g of water at 100∘C to steam to 540 g of ice to water respectively is 5:y then y = ___ Take latent heat of fusion 80 cal/gm and latent heat of vaporization as 540 cal/gm

Answer»

Ratio of heat energy required to change in states of $100 g$ of water at $100^{\circ} C$ to steam to $540 g$ of ice to water respectively is $5 : y$ then $y$ = ___

Take latent heat of fusion $80 c a l / g m$ and latent heat of vaporization as $540 c a l / g m$

Discussion

45.	What is the total momentum of the bullet and gun before firing a bullet of mass m and velocity v?
Answer» What is the total momentum of the bullet and gun before firing a bullet of mass m and velocity v?

Discussion

46.	A rifle of mass 5 kg fires a bullet of mass 40 g. The bullet leaves the barrel of the rifle with a velocity 200 m/s. If the bullet takes 0.004 s to leave the barrel, calculate the following: (i) recoil velocity of the rifle and (ii) the force experienced by the rifle due to its recoil.
Answer» A rifle of mass 5 kg fires a bullet of mass 40 g. The bullet leaves the barrel of the rifle with a velocity 200 m/s. If the bullet takes 0.004 s to leave the barrel, calculate the following: (i) recoil velocity of the rifle and (ii) the force experienced by the rifle due to its recoil.

Discussion

47.	Which of the component represents the rheostat in the given circuit?
Answer» Which of the component represents the rheostat in the given circuit?

Discussion

48.	What will be the power of a concave lens whose focal length is 2 m.
Answer» What will be the power of a concave lens whose focal length is $2 m$ .

Discussion

49.	1)What you mean by conservation of momentum
Answer» 1)What you mean by conservation of momentum

Discussion

50.	Difference between the work and work done? And the formula to find these two.
Answer» Difference between the work and work done? And the formula to find these two.

50.

Difference between the work and work done? And the formula to find these two.

Answer»

Difference between the work and work done?

And the formula to find these two.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Two objects of masses 8 kg and 25 kg which one has more inertia why ?

Why our voice echos in an empty room but doesn't echo in a room filled with lots of furniture and other things ?

A car moving with the speed 50 km/ he can be stopped by brakes after at least 6m. If the same car is moving with the speed of 100 km/hr the minimum stopping distance is

Which property of sound is used in Stethoscope? __

A wave transports energy and not matter. Justify this statement

How much current will an electric geyser draw from a 220V source, if the resistance of the geyser is 110Ω?

Gravitational force between a point mass m and M separated by a distance F. Now if a point mass 2m is placed next to m in contact with it, the force on M due to m and the total force on M are ?

A scooter acquires a velocity of 36km/h in 10 seconds just after the start.calculate the acceleration of the car.

If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be

With what speed in mileshr must an object be thrown vertically upwards to reach a height of 91.5 m? (Take a=9.8m/s2)

How does the speed of sound in air vary with temperature ?

In the figure shown below, current is flowing in the anticlockwise direction in a loop of wire. The part of the loop that faces towards you is ___ pole.

The persistence of audible sound due to the successive reflections from the surrounding objects even after the source has stopped to produce that sound is called

How many watts equal one horse power ?

A water tanker filled up to 23rd of its height is moving with a uniform speed. On sudden application of the brake, the water in the tank would

is power=work/time or power= energy/time or both then how it is true?

5 Difference between mass and charge

An insect moves along a circular path of radius 10 centimetre with a constant speed. It takes one minute to move from a point on the path to a diametrically opposite point. Find- A. the distance covered. B. The displacement C. The average velocity

Two objects, each of mass 1.5 kg are moving in the same straight line but in opposite directions. The velocity of each object is 2.5ms−1 before the collision during which they stick together. What will be the velocity of the combined object after collision?

A periscope is used for:

Complete the following sentences: (a) The kinetic energy of a body is the energy by virtue of its.......................... (b) The potential energy of a body is the energy by virtue of its..........................

A parachutist jumps from a height of 5000 m. The relationship between his falling speed, v and the distance fallen through, d is best represented as

Two objects of equal masses have the velocities 2 m/s and 3 m/s respectively. Find out the ratio of their kinetic energies respectively.

A solid object of relative density 1.25 is found to weigh 12g in water. Find its weight in air.

Why do we fall sideways when the bus takes a sharp turn?

A fruit is dropped from a height of 20 m. Find the velocity with which it would hit the ground.

A ray through the center of curvature hitting the spherical mirror, after reflection makes an angle of ____ with the normal.

SONAR stands for ___.

Amount of energy transferred from one trophic level to next is :

A 60 kg skydiver moving at terminal speed covers 40 m in 2 seconds. The skydiver is spending a power of ___ KW.

An observer sitting in line of two tanks, watches the flashes of two tanks firing at each other at the same time, but he hears the sounds of two shots 2 s and 3 - 5 a after seeing the flashes. If distance between the two tanks is 510 m, find the speed of sound.

Shishir was playing with a spring. He was compressing and releasing it. Suddenly he noticed that a ball, when kept on a spring, attains a certain height after it is compressed and released. In which of the following heights attained by the ball, Shishir has to spend the maximum of his energy?

Galvanic cell converts chemical energy into

Water flows through a horizontal tube as shown in figure. If the difference of heights of water column in the vertical tubes is 2 cm, and the areas of cross section at A and B are 4 cm2 and 2 cm2 respectively, find the rate of flow of water across any section. Given √215=0.365 approx.

20 derive the second equation of motion S is equal to UT Plus 1/2 at 2 numerically

What is velocity?

In the above 3 figures, the arrows indicate the direction of force and the magnitude of force is written above/below the arrows. Which box is experiencing balanced force?

A uniform magnetic field exists in the plane of a paper pointing from left to right as shown in Figure. The electron and the proton in the field experiences a force:

Tractor is pulling a trolley. Whether work is done or not? [1 MARKS]

300 g of coconut oil at 50∘C is mixed with 500 g kerosene at 10∘C. Determine the temperature of the mixture. (Specific heat of coconut oil = 2100 J kg−1 K−1 and specific heat of kerosene = 2000 J kg−1 K−1.

Ratio of heat energy required to change in states of 100 g of water at 100∘C to steam to 540 g of ice to water respectively is 5:y then y = ___ Take latent heat of fusion 80 cal/gm and latent heat of vaporization as 540 cal/gm

What is the total momentum of the bullet and gun before firing a bullet of mass m and velocity v?

A rifle of mass 5 kg fires a bullet of mass 40 g. The bullet leaves the barrel of the rifle with a velocity 200 m/s. If the bullet takes 0.004 s to leave the barrel, calculate the following: (i) recoil velocity of the rifle and (ii) the force experienced by the rifle due to its recoil.

Which of the component represents the rheostat in the given circuit?

What will be the power of a concave lens whose focal length is 2 m.

1)What you mean by conservation of momentum

Difference between the work and work done? And the formula to find these two.