9478 + Interview Questions in Physics Page 140 InterviewSolution

6951.	Question 6 The earth's plate responsible for causing an earthquake is (a) the crust of the earth (b) the mantle of the earth (c) the inner core of the earth (d) the outer core of the earth
Answer» Question 6 The earth's plate responsible for causing an earthquake is (a) the crust of the earth (b) the mantle of the earth (c) the inner core of the earth (d) the outer core of the earth

6951.

Question 6 The earth's plate responsible for causing an earthquake is (a) the crust of the earth (b) the mantle of the earth (c) the inner core of the earth (d) the outer core of the earth

Answer»

Question 6

The earth's plate responsible for causing an earthquake is
(a) the crust of the earth
(b) the mantle of the earth
(c) the inner core of the earth
(d) the outer core of the earth

Discussion

6952.	In Kelvin scale, ___.
Answer» In Kelvin scale, ___.

Discussion

6953.	What kind of action is drawing of water from a well? How can it happen that we are pulling the rope in downward direction and the bucket is moving in upward direction? [2 MARKS]
Answer» What kind of action is drawing of water from a well? How can it happen that we are pulling the rope in downward direction and the bucket is moving in upward direction? [2 MARKS]

Discussion

6954.	Question 23 An alarm bell is kept inside a vessel as shown in Fig. 13.1. A person standing close to it can distinctly hear the sound of alarm. Now if the air inside the vessel is removed completely how will the loudness of alarm get affected for the same person?
Answer» Question 23 An alarm bell is kept inside a vessel as shown in Fig. 13.1. A person standing close to it can distinctly hear the sound of alarm. Now if the air inside the vessel is removed completely how will the loudness of alarm get affected for the same person?

Discussion

6955.	If the distance between the highest and lowest point of a transverse wave is 17 cm, calculate the amplitude of the wave.
Answer» If the distance between the highest and lowest point of a transverse wave is 17 cm, calculate the amplitude of the wave.

Discussion

6956.	Fill in the following blanks with suitable words: (a) The angle of ................... equals the angle of reflection. (b) A person 1 m in front of a plane mirror seems to be ................... m away from his image. (c) If you touch your ................... ear with right hand in front of a plane mirror, it will be seen in the mirror that your right ear is touched with ................... (d) The size of pupil becomes ................... when you see in dim light. (e) Night birds have ...................cones than rods in their eyes. (f) The image of an object persists on the retina of an eye for about ................... second even after the object has disappeared. (g) If the still pictures of a moving object are flashed on our eyes at a rate faster than ................... pictures per second,the eye perceives the object as moving. (i) In a movie, the still pictures in proper sequence are projected on the screen usually at the rate of ................... pictures per second.
Answer» Fill in the following blanks with suitable words: (a) The angle of ................... equals the angle of reflection. (b) A person 1 m in front of a plane mirror seems to be ................... m away from his image. (c) If you touch your ................... ear with right hand in front of a plane mirror, it will be seen in the mirror that your right ear is touched with ................... (d) The size of pupil becomes ................... when you see in dim light. (e) Night birds have ...................cones than rods in their eyes. (f) The image of an object persists on the retina of an eye for about ................... second even after the object has disappeared. (g) If the still pictures of a moving object are flashed on our eyes at a rate faster than ................... pictures per second,the eye perceives the object as moving. (i) In a movie, the still pictures in proper sequence are projected on the screen usually at the rate of ................... pictures per second.

6956.

Fill in the following blanks with suitable words: (a) The angle of ................... equals the angle of reflection. (b) A person 1 m in front of a plane mirror seems to be ................... m away from his image. (c) If you touch your ................... ear with right hand in front of a plane mirror, it will be seen in the mirror that your right ear is touched with ................... (d) The size of pupil becomes ................... when you see in dim light. (e) Night birds have ...................cones than rods in their eyes. (f) The image of an object persists on the retina of an eye for about ................... second even after the object has disappeared. (g) If the still pictures of a moving object are flashed on our eyes at a rate faster than ................... pictures per second,the eye perceives the object as moving. (i) In a movie, the still pictures in proper sequence are projected on the screen usually at the rate of ................... pictures per second.

Answer»

Fill in the following blanks with suitable words:

(a) The angle of ................... equals the angle of reflection.

(b) A person 1 m in front of a plane mirror seems to be ................... m away from his image.

(c) If you touch your ................... ear with right hand in front of a plane mirror, it will be seen in the mirror that your right ear is touched with ...................

(d) The size of pupil becomes ................... when you see in dim light.

(e) Night birds have ...................cones than rods in their eyes.

(f) The image of an object persists on the retina of an eye for about ................... second even after the object has disappeared.

(g) If the still pictures of a moving object are flashed on our eyes at a rate faster than ................... pictures per second,the eye perceives the object as moving.

(i) In a movie, the still pictures in proper sequence are projected on the screen usually at the rate of ................... pictures per second.

Discussion

6957.	If the work done to transfer 10C of charge between two bodies A and B is 10 joules then find the potential maintained between them.
Answer» If the work done to transfer 10C of charge between two bodies A and B is 10 joules then find the potential maintained between them.

Discussion

6958.	How does a tilt axis of earth mainly affect??
Answer» How does a tilt axis of earth mainly affect??

Discussion

6959.	Why there is a difference between the days taken by a moon to complete the whole revolution and the again come to back to form a full moon?
Answer» Why there is a difference between the days taken by a moon to complete the whole revolution and the again come to back to form a full moon?

Discussion

6960.	The net force acting on a body of mass 1 kg moving with a uniform velocity of 5 ms^-1
Answer» The net force acting on a body of mass 1 kg moving with a uniform velocity of 5 ms^-1

Discussion

6961.	Two boys wearing in-line skates are standing on a surface with the palms of their hands touching and their arms bent, as shown in the figure. If Boy X pushes by straightening his arms out while Boy Y holds his arms in the original position, what is the motion of the two boys?
Answer» Two boys wearing in-line skates are standing on a surface with the palms of their hands touching and their arms bent, as shown in the figure. If Boy X pushes by straightening his arms out while Boy Y holds his arms in the original position, what is the motion of the two boys?

Discussion

6962.	A block of mass 2kg is placed on the floor.The coefficient of static friction between the two surfaces is 0.4 . A horizontal force of 2.5N is applied on the block . The force of friction between the block and the floor is ?
Answer» A block of mass 2kg is placed on the floor.The coefficient of static friction between the two surfaces is 0.4 . A horizontal force of 2.5N is applied on the block . The force of friction between the block and the floor is ?

Discussion

6963.	In an experiment, the two opposite ends of a cart are attached to two horses respectively. The two horses are trying to move the cart in their respective directions, but it is observed that the position of the cart does not change. What can be the possible explanation?
Answer» In an experiment, the two opposite ends of a cart are attached to two horses respectively. The two horses are trying to move the cart in their respective directions, but it is observed that the position of the cart does not change. What can be the possible explanation?

Discussion

6964.	In charging by friction why one object should be an insulator.
Answer» In charging by friction why one object should be an insulator.

Discussion

6965.	Friction is necessary evil why?
Answer» Friction is necessary evil why?

Discussion

6966.	For a conservative force, F is equal to
Answer» For a conservative force, F is equal to

Discussion

6967.	A student staying in a coastal region tests the drinking water and also the sea water with a circuit in which a part of the connecting wire is wound around a matchbox containing compass. He finds that the compass needle deflects more in the case of sea water. Can you explain the reason ?
Answer» A student staying in a coastal region tests the drinking water and also the sea water with a circuit in which a part of the connecting wire is wound around a matchbox containing compass. He finds that the compass needle deflects more in the case of sea water. Can you explain the reason ?

Discussion

6968.	The electrolysis of AgCl with carbon electrode would give which of the gases at anode?
Answer» The electrolysis of AgCl with carbon electrode would give which of the gases at anode?

Discussion

6969.	Describe an experiment to demonstrate the thermal expansion in solids.
Answer» Describe an experiment to demonstrate the thermal expansion in solids.

Discussion

6970.	A car starts from Bangalore to Mumbai and returns back to Bangalore in 20 hrs. When started the odometer reading was 2200 km and when finished it was 3800 km. Find the average velocity and average speed of the car?
Answer» A car starts from Bangalore to Mumbai and returns back to Bangalore in $20 h r s$ . When started the odometer reading was $2200 k m$ and when finished it was $3800 k m$ . Find the average velocity and average speed of the car?

Discussion

6971.	Obtain relationship between the time period and frequency.
Answer» Obtain relationship between the time period and frequency.

Discussion

6972.	A car decreases its speed from 80 kmhr−1 to 60 kmhr−1 in 5 seconds. The acceleration of the car is:
Answer» A car decreases its speed from $80 k m h r^{- 1}$ to $60 k m h r^{- 1}$ in $5$ seconds. The acceleration of the car is:

Discussion

6973.	After holding a pack of ice in your hand for some time, you put your hand in water at room temperature. Your hand would now feel ___.
Answer» After holding a pack of ice in your hand for some time, you put your hand in water at room temperature. Your hand would now feel ___.

Discussion

6974.	A particle of mass m moves on a straight line with its velocity varying with the distance travelled according to the equation v = a√x, where 'a' is a constant.Find the total work done by all the forces during a displacement from x = 0 to x = d.
Answer» A particle of mass m moves on a straight line with its velocity varying with the distance travelled according to the equation v = a $\sqrt{x}$ , where 'a' is a constant.Find the total work done by all the forces during a displacement from x = 0 to x = d.

Discussion

6975.	The frequency which is not audible to the human ear is:
Answer» The frequency which is not audible to the human ear is:

Discussion

6976.	In the context of an earthquake, which one is deep under the ground: focus or epicentre?
Answer» In the context of an earthquake, which one is deep under the ground: focus or epicentre?

Discussion

6977.	(a) How does a lightning conductor protect a tall building? Name the scientist who invented the lightning conductor. (b) Why are lightning strikes more frequent in hilly areas?
Answer» (a) How does a lightning conductor protect a tall building? Name the scientist who invented the lightning conductor. (b) Why are lightning strikes more frequent in hilly areas?

6977.

(a) How does a lightning conductor protect a tall building? Name the scientist who invented the lightning conductor. (b) Why are lightning strikes more frequent in hilly areas?

Answer»

(a) How does a lightning conductor protect a tall building? Name the scientist who invented the lightning conductor.

(b) Why are lightning strikes more frequent in hilly areas?

Discussion

6978.	Ram brought a magnet near 3 pins made up of different materials. Pins Y and Z get attracted whereas pin X remains at its place as shown below. Then X,Y,Z are _________,________,__________ respectively.
Answer» Ram brought a magnet near 3 pins made up of different materials. Pins Y and Z get attracted whereas pin X remains at its place as shown below. Then X,Y,Z are _________,________,__________ respectively.

6978.

Ram brought a magnet near 3 pins made up of different materials. Pins Y and Z get attracted whereas pin X remains at its place as shown below. Then X,Y,Z are _,,__ respectively.

Answer»

Ram brought a magnet near 3 pins made up of different materials. Pins Y and Z get attracted whereas pin X remains at its place as shown below.

Then X,Y,Z are _________,________,__________ respectively.

Discussion

6979.	A capacitor consists of
Answer» A capacitor consists of

Discussion

6980.	Which of the following mirror has more field of view?
Answer» Which of the following mirror has more field of view?

Discussion

6981.	Fill in the blank 1 V = 1 __ C−1 (in SI units)
Answer» Fill in the blank 1 V = 1 __ $C^{- 1}$ (in SI units)

6981.

Fill in the blank 1 V = 1 __ C−1 (in SI units)

Answer»

Fill in the blank

1 V = 1 __ $C^{- 1}$

(in SI units)

Discussion

6982.	How is the speed of light measured?
Answer» How is the speed of light measured?

Discussion

6983.	Question 4 Suppose your writing desk is tilted a little. A book kept on it starts sliding down. Show the direction of the frictional force acting on it.
Answer» Question 4 Suppose your writing desk is tilted a little. A book kept on it starts sliding down. Show the direction of the frictional force acting on it.

Discussion

6984.	The thickness of a dozen coins on a metre scale was found to be 18 cm. What is the thickness of one coin?
Answer» The thickness of a dozen coins on a metre scale was found to be $18 c m$ . What is the thickness of one coin?

Discussion

6985.	Pressure at a point in a liquid is:
Answer» Pressure at a point in a liquid is:

Discussion

6986.	Which of the following is/are magnetic material(s)?
Answer» Which of the following is/are magnetic material(s)?

Discussion

6987.	A body starting from rest is moving with an uniform acceleration of 8m/s^2.Then the distance travelled by it in 5th second will be....
Answer» A body starting from rest is moving with an uniform acceleration of 8m/s^2.Then the distance travelled by it in 5th second will be....

Discussion

6988.	Can you charge an insulator by the method of conduction?
Answer» Can you charge an insulator by the method of conduction?

Discussion

6989.	What are the types of noise pollution?
Answer» What are the types of noise pollution?

Discussion

6990.	Green spot is formed on the potato when it is connected to an electric circuit. Why?
Answer» Green spot is formed on the potato when it is connected to an electric circuit. Why?

Discussion

6991.	A)Explain why it is convient to pull the luggages fitted with rollers?
Answer» A)Explain why it is convient to pull the luggages fitted with rollers?

Discussion

6992.	What is the period of Halley’s comet?
Answer» What is the period of Halley’s comet?

Discussion

6993.	In this chapter it is explained that we are actually not touching anything only the atoms start repeling each other. So why do we feel that the object is hot or cold?
Answer» In this chapter it is explained that we are actually not touching anything only the atoms start repeling each other. So why do we feel that the object is hot or cold?

Discussion

6994.	Why do we use insulated copper wire while making electromagnets ?
Answer» Why do we use insulated copper wire while making electromagnets ?

Discussion

6995.	The writer praises typewriters for all the following reasons EXCEPT
Answer» The writer praises typewriters for all the following reasons EXCEPT

Discussion

6996.	What is the boiling point of water in celsius ?
Answer» What is the boiling point of water in celsius ?

Discussion

6997.	An object of mass 1 kg is moving at a speed of 10 ms−1. Constant force acts on the object for 4 s and changes the speed of object to 2 ms−1 in the opposite direction. Choose the correct options:
Answer» An object of mass $1 k g$ is moving at a speed of $10 m s^{- 1}$ . Constant force acts on the object for $4 s$ and changes the speed of object to $2 m s^{- 1}$ in the opposite direction. Choose the correct options:

Discussion

6998.	Is anything properly uniform in this world and how can you say this?
Answer» Is anything properly uniform in this world and how can you say this?

Discussion

6999.	Give reasons: The twinkling of stars
Answer» Give reasons: The twinkling of stars

6999.

Give reasons: The twinkling of stars

Answer»

Give reasons:

The twinkling of stars

Discussion

7000.	A bullet moving with a velocity of 200 cm/s penetrates a wooden block and comes to rest after traversing 4 cm inside it. What velocity is needed for travelling distance of 9 cm in same block?
Answer» A bullet moving with a velocity of 200 cm/s penetrates a wooden block and comes to rest after traversing 4 cm inside it. What velocity is needed for travelling distance of 9 cm in same block?

Discussion

Explore topic-wise InterviewSolutions in .

Question 6 The earth's plate responsible for causing an earthquake is (a) the crust of the earth (b) the mantle of the earth (c) the inner core of the earth (d) the outer core of the earth

In Kelvin scale, ___.

What kind of action is drawing of water from a well? How can it happen that we are pulling the rope in downward direction and the bucket is moving in upward direction? [2 MARKS]

Question 23 An alarm bell is kept inside a vessel as shown in Fig. 13.1. A person standing close to it can distinctly hear the sound of alarm. Now if the air inside the vessel is removed completely how will the loudness of alarm get affected for the same person?

If the distance between the highest and lowest point of a transverse wave is 17 cm, calculate the amplitude of the wave.

If the work done to transfer 10C of charge between two bodies A and B is 10 joules then find the potential maintained between them.

How does a tilt axis of earth mainly affect??

Why there is a difference between the days taken by a moon to complete the whole revolution and the again come to back to form a full moon?

The net force acting on a body of mass 1 kg moving with a uniform velocity of 5 ms^-1

Two boys wearing in-line skates are standing on a surface with the palms of their hands touching and their arms bent, as shown in the figure. If Boy X pushes by straightening his arms out while Boy Y holds his arms in the original position, what is the motion of the two boys?

A block of mass 2kg is placed on the floor.The coefficient of static friction between the two surfaces is 0.4 . A horizontal force of 2.5N is applied on the block . The force of friction between the block and the floor is ?

In an experiment, the two opposite ends of a cart are attached to two horses respectively. The two horses are trying to move the cart in their respective directions, but it is observed that the position of the cart does not change. What can be the possible explanation?

In charging by friction why one object should be an insulator.

Friction is necessary evil why?

For a conservative force, F is equal to

A student staying in a coastal region tests the drinking water and also the sea water with a circuit in which a part of the connecting wire is wound around a matchbox containing compass. He finds that the compass needle deflects more in the case of sea water. Can you explain the reason ?

The electrolysis of AgCl with carbon electrode would give which of the gases at anode?

Describe an experiment to demonstrate the thermal expansion in solids.

A car starts from Bangalore to Mumbai and returns back to Bangalore in 20 hrs. When started the odometer reading was 2200 km and when finished it was 3800 km. Find the average velocity and average speed of the car?

Obtain relationship between the time period and frequency.

A car decreases its speed from 80 kmhr−1 to 60 kmhr−1 in 5 seconds. The acceleration of the car is:

After holding a pack of ice in your hand for some time, you put your hand in water at room temperature. Your hand would now feel ___.

A particle of mass m moves on a straight line with its velocity varying with the distance travelled according to the equation v = a√x, where 'a' is a constant.Find the total work done by all the forces during a displacement from x = 0 to x = d.

The frequency which is not audible to the human ear is:

In the context of an earthquake, which one is deep under the ground: focus or epicentre?

(a) How does a lightning conductor protect a tall building? Name the scientist who invented the lightning conductor. (b) Why are lightning strikes more frequent in hilly areas?

Ram brought a magnet near 3 pins made up of different materials. Pins Y and Z get attracted whereas pin X remains at its place as shown below. Then X,Y,Z are _________,________,__________ respectively.

A capacitor consists of

Which of the following mirror has more field of view?

Fill in the blank 1 V = 1 __ C−1 (in SI units)

How is the speed of light measured?

Question 4 Suppose your writing desk is tilted a little. A book kept on it starts sliding down. Show the direction of the frictional force acting on it.

The thickness of a dozen coins on a metre scale was found to be 18 cm. What is the thickness of one coin?

Pressure at a point in a liquid is:

Which of the following is/are magnetic material(s)?

A body starting from rest is moving with an uniform acceleration of 8m/s^2.Then the distance travelled by it in 5th second will be....

Can you charge an insulator by the method of conduction?

What are the types of noise pollution?

Green spot is formed on the potato when it is connected to an electric circuit. Why?

A)Explain why it is convient to pull the luggages fitted with rollers?

What is the period of Halley’s comet?

In this chapter it is explained that we are actually not touching anything only the atoms start repeling each other. So why do we feel that the object is hot or cold?

Why do we use insulated copper wire while making electromagnets ?

The writer praises typewriters for all the following reasons EXCEPT

What is the boiling point of water in celsius ?

An object of mass 1 kg is moving at a speed of 10 ms−1. Constant force acts on the object for 4 s and changes the speed of object to 2 ms−1 in the opposite direction. Choose the correct options:

Is anything properly uniform in this world and how can you say this?

Give reasons: The twinkling of stars

A bullet moving with a velocity of 200 cm/s penetrates a wooden block and comes to rest after traversing 4 cm inside it. What velocity is needed for travelling distance of 9 cm in same block?

Ram brought a magnet near 3 pins made up of different materials. Pins Y and Z get attracted whereas pin X remains at its place as shown below. Then X,Y,Z are _,,__ respectively.