13232 + Interview Questions in Physics

1.	Which has more density 1g of cotton or 1g of iron. Explain
Answer» Which has more density 1g of cotton or 1g of iron. Explain

Discussion

2.	Define the term 'Watt'.
Answer» Define the term 'Watt'.

Discussion

3.	How is the frequency of a wave related to its time period ?
Answer» How is the frequency of a wave related to its time period ?

Discussion

4.	1) A 10 g bullet travelling at 200 m/s strikes and remaines embedded in a 2 kg target which is originally at rest but free to move. At what speed should the target move off?
Answer» 1) A 10 g bullet travelling at 200 m/s strikes and remaines embedded in a 2 kg target which is originally at rest but free to move. At what speed should the target move off?

Discussion

5.	The amount of matter in unit volume of a substance is its _______.
Answer» The amount of matter in unit volume of a substance is its _______.

Discussion

6.	A train starting from rest position and moving with uniform acceleration attains a speed of 36km/hr in 10 min.find it's acceleration?
Answer» A train starting from rest position and moving with uniform acceleration attains a speed of 36km/hr in 10 min.find it's acceleration?

Discussion

7.	A metre stick , of mass 400 g, is pivoted at one end displaced through an angle 60∘ . The increase in its potential energy is
Answer» A metre stick , of mass 400 g, is pivoted at one end displaced through an angle $60^{\circ}$ . The increase in its potential energy is

7.

A metre stick , of mass 400 g, is pivoted at one end displaced through an angle 60∘ . The increase in its potential energy is

Answer»

A metre stick , of mass 400 g, is pivoted at one end displaced through an angle $60^{\circ}$ . The increase in its potential energy is

Discussion

8.	Okay water has a buoyancy force that lifts us and the gravitational force is less there but wasn't it explained that gravitational force is not affected by the medium surrounded
Answer» Okay water has a buoyancy force that lifts us and the gravitational force is less there but wasn't it explained that gravitational force is not affected by the medium surrounded

Discussion

9.	The following diagram shows part of a screw gauge. What is the reading?
Answer» The following diagram shows part of a screw gauge. What is the reading?

9.

The following diagram shows part of a screw gauge. What is the reading?

Answer»

The following diagram shows part of a screw gauge. What is the reading?

Discussion

10.	The vessel shown in the figure has two sections of areas of cross-section A1 and A2. A liquid of density p fills both the sections, up to a height h in each . Neglect atmospheric pressure. 1) The pressure by the liquid on the base of the vessel is 2h pg 2) The force exerted by the liquid on the base of the vessel is 2h pgA2 3) The weight of the liquid is < 2h pgA2 4) The walls of the vessel at the level X exert a downward force hpg (A2−A1) on the liquid
Answer» The vessel shown in the figure has two sections of areas of cross-section $A_{1}$ and $A_{2}$ . A liquid of density p fills both the sections, up to a height h in each . Neglect atmospheric pressure. 1) The pressure by the liquid on the base of the vessel is 2h pg 2) The force exerted by the liquid on the base of the vessel is 2h pg $A_{2}$ 3) The weight of the liquid is < 2h pg $A_{2}$ 4) The walls of the vessel at the level X exert a downward force hpg $(A_{2} - A_{1})$ on the liquid

10.

The vessel shown in the figure has two sections of areas of cross-section A1 and A2. A liquid of density p fills both the sections, up to a height h in each . Neglect atmospheric pressure. 1) The pressure by the liquid on the base of the vessel is 2h pg 2) The force exerted by the liquid on the base of the vessel is 2h pgA2 3) The weight of the liquid is < 2h pgA2 4) The walls of the vessel at the level X exert a downward force hpg (A2−A1) on the liquid

Answer»

The vessel shown in the figure has two sections of areas of cross-section $A_{1}$ and $A_{2}$ . A liquid of density p fills both the sections, up to a height h in each .

Neglect atmospheric pressure.

1) The pressure by the liquid on the base of the vessel is 2h pg

2) The force exerted by the liquid on the base of the vessel is 2h pg $A_{2}$

3) The weight of the liquid is < 2h pg $A_{2}$

4) The walls of the vessel at the level X exert a downward force hpg $(A_{2} - A_{1})$ on the liquid

Discussion

11.	If the mass of one body is doubled, then the force F between two bodies become
Answer» If the mass of one body is doubled, then the force F between two bodies become

Discussion

12.	Compare the gravitational forces exerted by the Sun and the moon on the Earth. Which one exerts a greater force on the Earth? (Given: mass of the Sun, Ms=4×1031kg, mass of moon, Mm=6.3×1022kg, distance between the Sun and the Earth,rse=1.3×1012m and the distance between moon and the Earth, rme =4.5×108m.
Answer» Compare the gravitational forces exerted by the Sun and the moon on the Earth. Which one exerts a greater force on the Earth? (Given: mass of the Sun, $M_{s} = 4 \times 10^{31} k g$ , mass of moon, $M_{m} = 6.3 \times 10^{22} k g$ , distance between the Sun and the Earth, $r_{s e} = 1.3 \times 10^{12} m$ and the distance between moon and the Earth, $r_{m e} = 4.5 \times 10^{8} m$ .

Discussion

13.	What is the nature of sound waves through solids, liquids and gases?
Answer» What is the nature of sound waves through solids, liquids and gases?

Discussion

14.	When is the instantaneous speed same as the average speed?
Answer» When is the instantaneous speed same as the average speed?

Discussion

15.	I need a science project for an competition. I have chosen the topic of sustainable energy the project should be:- - Innovative -Creative - No copy or plagiarism from internet - Economic -Reliable -Portable Please help me by some ideas with some projects
Answer» I need a science project for an competition. I have chosen the topic of sustainable energy the project should be:- - Innovative -Creative - No copy or plagiarism from internet - Economic -Reliable -Portable Please help me by some ideas with some projects

15.

I need a science project for an competition. I have chosen the topic of sustainable energy the project should be:- - Innovative -Creative - No copy or plagiarism from internet - Economic -Reliable -Portable Please help me by some ideas with some projects

Answer»

I need a science project for an competition. I have chosen the topic of sustainable energy the project should be:-

- Innovative

-Creative

- No copy or plagiarism from internet

- Economic

-Reliable

-Portable

Please help me by some ideas with some projects

Discussion

16.	A person of mass 80kg is inside an elevator moving upwards against the gravity with an acceleration of 6m/s^2. Taking g = 10m/s^2, what is the net weight of the person?
Answer» A person of mass 80kg is inside an elevator moving upwards against the gravity with an acceleration of 6m/s^2. Taking g = 10m/s^2, what is the net weight of the person?

Discussion

17.	The length of a simple pendulum is made one-fourth. Its time period becomes : (a) four times (b) one-fourth (c) double (d) half.
Answer» The length of a simple pendulum is made one-fourth. Its time period becomes : (a) four times (b) one-fourth (c) double (d) half.

17.

The length of a simple pendulum is made one-fourth. Its time period becomes : (a) four times (b) one-fourth (c) double (d) half.

Answer»

The length of a simple pendulum is made one-fourth. Its time period becomes :

(a) four times (b) one-fourth

(c) double (d) half.

Discussion

18.	After applying a brake on a car, it generates acceleration of 6ms2 in the opposite direction of the speed, if the car takes time of 2sec to stop after the brake is applied, then calculate the distance traveled in that time.
Answer» After applying a brake on a car, it generates acceleration of 6ms² in the opposite direction of the speed, if the car takes time of 2sec to stop after the brake is applied, then calculate the distance traveled in that time.

Discussion

19.	Write any two applacationof chronograph
Answer» Write any two applacationof chronograph

Discussion

20.	Which of the following shows oscillatory motion?
Answer» Which of the following shows oscillatory motion?

Discussion

21.	A car starts from home and reaches its destination which is 20 km away. It returns back to home taking a total time of 2 hours. The average velocity of the car is _____ ms−1.
Answer» A car starts from home and reaches its destination which is $20 k m$ away. It returns back to home taking a total time of $2 h o u r s$ . The average velocity of the car is _____ $m s^{- 1}$ .

Discussion

22.	A solar cell converts ______.
Answer» A solar cell converts ______.

Discussion

23.	The refractive index of glass is 1.5. What does it mean? (Note : c is the velocity of light in vacuum, vg is the velocity of light in glass.)
Answer» The refractive index of glass is 1.5. What does it mean? (Note : $c$ is the velocity of light in vacuum, $v_{g}$ is the velocity of light in glass.)

Discussion

24.	Explain the nature of Light and Sound waves. [3 MARKS]
Answer» Explain the nature of Light and Sound waves. [3 MARKS]

Discussion

25.	A person standing on the edge of a cliff of height 40 m above the ground throws the first ball straight up with an initial velocity of 20 ms, and then throws the second ball straight down with the same initial velocity 20 ms. What are their respective velocities just before they hit the ground. (Take a = 10 m/s2)
Answer» A person standing on the edge of a cliff of height 40 m above the ground throws the first ball straight up with an initial velocity of 20 $\frac{m}{s}$ , and then throws the second ball straight down with the same initial velocity 20 $\frac{m}{s}$ . What are their respective velocities just before they hit the ground. (Take a = 10 $m / s^{2}$ )

Discussion

26.	Total internal reflection of light is possible when light enters from
Answer» Total internal reflection of light is possible when light enters from

Discussion

27.	In the following example, try to identify the number of times the velocity of ball changes: 'A football player kicks a football to another player of his team who kicks the football towards the goal. The goalkeeper of the opposite team collects the football and kicks it towards a player of his own team.'
Answer» In the following example, try to identify the number of times the velocity of ball changes: 'A football player kicks a football to another player of his team who kicks the football towards the goal. The goalkeeper of the opposite team collects the football and kicks it towards a player of his own team.'

27.

In the following example, try to identify the number of times the velocity of ball changes: 'A football player kicks a football to another player of his team who kicks the football towards the goal. The goalkeeper of the opposite team collects the football and kicks it towards a player of his own team.'

Answer»

In the following example, try to identify the number of times the velocity of ball changes:

'A football player kicks a football to another player of his team who kicks the football towards the goal. The goalkeeper of the opposite team collects the football and kicks it towards a player of his own team.'

Discussion

28.	The minimum distance between the object and the image formed by a concave mirror can be: (f is the focal length of the mirror)
Answer» The minimum distance between the object and the image formed by a concave mirror can be: (f is the focal length of the mirror)

28.

The minimum distance between the object and the image formed by a concave mirror can be: (f is the focal length of the mirror)

Answer»

The minimum distance between the object and the image formed by a concave mirror can be:
(f is the focal length of the mirror)

Discussion

29.	The mechanical advantage of an inclined plane is always
Answer» The mechanical advantage of an inclined plane is always

Discussion

30.	Two sounds having the same speed in a medium are having wavelengths 1.3 m and 3.9 m. A person listens to these sounds. What difference would the listener feel?
Answer» Two sounds having the same speed in a medium are having wavelengths 1.3 m and 3.9 m. A person listens to these sounds. What difference would the listener feel?

Discussion

31.	Question 5 (c) What is the physical state of water at— (c)100∘C
Answer» Question 5 (c) What is the physical state of water at— $(c) 100^{\circ} C$

Discussion

32.	Use the following information to answer the next question. ' What is the length of PS in the given figure?
Answer» Use the following information to answer the next question. ' What is the length of PS in the given figure?

32.

Use the following information to answer the next question. ' What is the length of PS in the given figure?

Answer»

Use the following information to answer the next question.

'

What is the length of PS in the given figure?

Discussion

33.	A man is moving with 36 kmph. On seeing an obstacle in the path, he applies brakes and decelerates at 5 m/s2, if the time of reaction is 0.9 seconds. Then the total distance covered before he stops is:
Answer» A man is moving with 36 kmph. On seeing an obstacle in the path, he applies brakes and decelerates at 5 m/s2, if the time of reaction is 0.9 seconds. Then the total distance covered before he stops is:

Discussion

34.	The physical quantity that is indicated by the direction of thumb in Fleming's left-hand rule is
Answer» The physical quantity that is indicated by the direction of thumb in Fleming's left-hand rule is

Discussion

35.	Use the following information to answer the next question. Four pins (I, II, III, and IV) are fixed to a metallic rod with the help of wax. The rod is heated at one end. Which of the following pins would drop first?
Answer» Use the following information to answer the next question. Four pins (I, II, III, and IV) are fixed to a metallic rod with the help of wax. The rod is heated at one end. Which of the following pins would drop first?

35.

Use the following information to answer the next question. Four pins (I, II, III, and IV) are fixed to a metallic rod with the help of wax. The rod is heated at one end. Which of the following pins would drop first?

Answer»

Use the following information to answer the next question.

Four pins (I, II, III, and IV) are fixed to a metallic rod with the help of wax. The rod is heated at one end.

Which of the following pins would drop first?

Discussion

36.	A gun weighing 4 kg fires a bullet of 40 g with a velocity of 500 ms−1. The velocity with which gun recoils is
Answer» A gun weighing $4 k g$ fires a bullet of $40 g$ with a velocity of $500 m s^{- 1}$ . The velocity with which gun recoils is

Discussion

37.	What transformation of energy takes place when current is drawn from a cell?
Answer» What transformation of energy takes place when current is drawn from a cell?

Discussion

38.	The passage is primarily concerned with
Answer» The passage is primarily concerned with

Discussion

39.	Potential energy of your body is minimum when___________.
Answer» Potential energy of your body is minimum when___________.

Discussion

40.	The physical quantity, which is the measure of inertia, is ________.
Answer» The physical quantity, which is the measure of inertia, is ________.

Discussion

41.	A body of mass m has a momentum p. What is its kinetic energy?
Answer» A body of mass $m$ has a momentum $p$ . What is its kinetic energy?

Discussion

42.	Which device would you use to open and close a circuit?
Answer» Which device would you use to open and close a circuit?

Discussion

43.	Question 21 Using following data, draw time - displacement graph for a moving object: Use this graph to find average velocity for first 4 s, for next 4 s and for last 6 s.
Answer» Question 21 Using following data, draw time - displacement graph for a moving object: Use this graph to find average velocity for first 4 s, for next 4 s and for last 6 s.

Discussion

44.	Water and mercury are filled in two cylindrical vessels up to same height. Both vessels have a hole in the wall near the bottom. The velocity of water and mercury coming out of the holes are v1 and v2 respectively.
Answer» Water and mercury are filled in two cylindrical vessels up to same height. Both vessels have a hole in the wall near the bottom. The velocity of water and mercury coming out of the holes are v₁ and v₂ respectively.

Discussion

45.	Choose the correct answer regarding force.
Answer» Choose the correct answer regarding force.

Discussion

46.	A train is traveling at a speed of 90kmper h.brakes are applied so as to produce a uniform acceleration of 0.5mpersec square.find how far the train will go before it is brought to rest.
Answer» A train is traveling at a speed of 90kmper h.brakes are applied so as to produce a uniform acceleration of 0.5mpersec square.find how far the train will go before it is brought to rest.

Discussion

47.	One of the following can hear infrasound. This one is (a) dog (b) bat (c) rhinoceros (d) humans
Answer» One of the following can hear infrasound. This one is (a) dog (b) bat (c) rhinoceros (d) humans

47.

One of the following can hear infrasound. This one is (a) dog (b) bat (c) rhinoceros (d) humans

Answer»

One of the following can hear infrasound. This one is

(a) dog

(b) bat

(c) rhinoceros

(d) humans

Discussion

48.	Is rate of change of momentum and force equivalent to each other? F=ma And also ∆p=(mv -mu)/t ∆p=ma
Answer» Is rate of change of momentum and force equivalent to each other? F=ma And also ∆p=(mv -mu)/t ∆p=ma

48.

Is rate of change of momentum and force equivalent to each other? F=ma And also ∆p=(mv -mu)/t ∆p=ma

Answer»

Is rate of change of momentum and force equivalent to each other?

F=ma

And also

∆p=(mv -mu)/t

∆p=ma

Discussion

49.	When is work said to be done against the force of gravity?
Answer» When is work said to be done against the force of gravity?

Discussion

50.	A stone is thrown upwards as shown in the diagram. When it reaches P, which of the following has the greatest value for the stone? (a) its acceleration (b) its kinetic energy (c) its potential energy (d) its weight
Answer» A stone is thrown upwards as shown in the diagram. When it reaches P, which of the following has the greatest value for the stone? (a) its acceleration (b) its kinetic energy (c) its potential energy (d) its weight

50.

A stone is thrown upwards as shown in the diagram. When it reaches P, which of the following has the greatest value for the stone? (a) its acceleration (b) its kinetic energy (c) its potential energy (d) its weight

Answer»

A stone is thrown upwards as shown in the diagram. When it reaches P, which of the following has the greatest value for the stone?

(a) its acceleration

(b) its kinetic energy

(c) its potential energy

(d) its weight

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which has more density 1g of cotton or 1g of iron. Explain

Define the term 'Watt'.

How is the frequency of a wave related to its time period ?

1) A 10 g bullet travelling at 200 m/s strikes and remaines embedded in a 2 kg target which is originally at rest but free to move. At what speed should the target move off?

The amount of matter in unit volume of a substance is its _______.

A train starting from rest position and moving with uniform acceleration attains a speed of 36km/hr in 10 min.find it's acceleration?

A metre stick , of mass 400 g, is pivoted at one end displaced through an angle 60∘ . The increase in its potential energy is

Okay water has a buoyancy force that lifts us and the gravitational force is less there but wasn't it explained that gravitational force is not affected by the medium surrounded

The following diagram shows part of a screw gauge. What is the reading?

If the mass of one body is doubled, then the force F between two bodies become

What is the nature of sound waves through solids, liquids and gases?

When is the instantaneous speed same as the average speed?

I need a science project for an competition. I have chosen the topic of sustainable energy the project should be:- - Innovative -Creative - No copy or plagiarism from internet - Economic -Reliable -Portable Please help me by some ideas with some projects

A person of mass 80kg is inside an elevator moving upwards against the gravity with an acceleration of 6m/s^2. Taking g = 10m/s^2, what is the net weight of the person?

The length of a simple pendulum is made one-fourth. Its time period becomes : (a) four times (b) one-fourth (c) double (d) half.

After applying a brake on a car, it generates acceleration of 6ms2 in the opposite direction of the speed, if the car takes time of 2sec to stop after the brake is applied, then calculate the distance traveled in that time.

Write any two applacationof chronograph

Which of the following shows oscillatory motion?

A car starts from home and reaches its destination which is 20 km away. It returns back to home taking a total time of 2 hours. The average velocity of the car is _____ ms−1.

A solar cell converts ______.

The refractive index of glass is 1.5. What does it mean? (Note : c is the velocity of light in vacuum, vg is the velocity of light in glass.)

Explain the nature of Light and Sound waves. [3 MARKS]

Total internal reflection of light is possible when light enters from

The minimum distance between the object and the image formed by a concave mirror can be: (f is the focal length of the mirror)

The mechanical advantage of an inclined plane is always

Two sounds having the same speed in a medium are having wavelengths 1.3 m and 3.9 m. A person listens to these sounds. What difference would the listener feel?

Question 5 (c) What is the physical state of water at— (c)100∘C

Use the following information to answer the next question. ' What is the length of PS in the given figure?

A man is moving with 36 kmph. On seeing an obstacle in the path, he applies brakes and decelerates at 5 m/s2, if the time of reaction is 0.9 seconds. Then the total distance covered before he stops is:

The physical quantity that is indicated by the direction of thumb in Fleming's left-hand rule is

Use the following information to answer the next question. Four pins (I, II, III, and IV) are fixed to a metallic rod with the help of wax. The rod is heated at one end. Which of the following pins would drop first?

A gun weighing 4 kg fires a bullet of 40 g with a velocity of 500 ms−1. The velocity with which gun recoils is

What transformation of energy takes place when current is drawn from a cell?

The passage is primarily concerned with

Potential energy of your body is minimum when___________.

The physical quantity, which is the measure of inertia, is ________.

A body of mass m has a momentum p. What is its kinetic energy?

Which device would you use to open and close a circuit?

Question 21 Using following data, draw time - displacement graph for a moving object: Use this graph to find average velocity for first 4 s, for next 4 s and for last 6 s.

Water and mercury are filled in two cylindrical vessels up to same height. Both vessels have a hole in the wall near the bottom. The velocity of water and mercury coming out of the holes are v1 and v2 respectively.

Choose the correct answer regarding force.

A train is traveling at a speed of 90kmper h.brakes are applied so as to produce a uniform acceleration of 0.5mpersec square.find how far the train will go before it is brought to rest.

One of the following can hear infrasound. This one is (a) dog (b) bat (c) rhinoceros (d) humans

Is rate of change of momentum and force equivalent to each other? F=ma And also ∆p=(mv -mu)/t ∆p=ma

When is work said to be done against the force of gravity?

A stone is thrown upwards as shown in the diagram. When it reaches P, which of the following has the greatest value for the stone? (a) its acceleration (b) its kinetic energy (c) its potential energy (d) its weight