9478 + Interview Questions in Physics Page 137 InterviewSolution

6801.	The largest natural satellite in our solar system belongs to which planet
Answer» The largest natural satellite in our solar system belongs to which planet

Discussion

6802.	On one hand you say that when two smooth, even surfaces slide over each other, there is adhesion between them which causes friction. On the other you say that there is no friction between two smooth surfaces. I'm not getting. Mark the word SMOOTH.
Answer» On one hand you say that when two smooth, even surfaces slide over each other, there is adhesion between them which causes friction. On the other you say that there is no friction between two smooth surfaces. I'm not getting. Mark the word SMOOTH.

6802.

On one hand you say that when two smooth, even surfaces slide over each other, there is adhesion between them which causes friction. On the other you say that there is no friction between two smooth surfaces. I'm not getting. Mark the word SMOOTH.

Answer»

On one hand you say that when two smooth, even surfaces slide over each other, there is adhesion between them which causes friction. On the other you say that there is no friction between two smooth surfaces. I'm not getting.

Mark the word SMOOTH.

Discussion

6803.	What do you mean by sublimation? Explain with an example.
Answer» What do you mean by sublimation? Explain with an example.

Discussion

6804.	Which of the following vibrates when a musical note is produced by the cymbals in an orchestra? (a) stretched strings (b) stretched membranes (c) metal plates (d) air columns
Answer» Which of the following vibrates when a musical note is produced by the cymbals in an orchestra? (a) stretched strings (b) stretched membranes (c) metal plates (d) air columns

6804.

Which of the following vibrates when a musical note is produced by the cymbals in an orchestra? (a) stretched strings (b) stretched membranes (c) metal plates (d) air columns

Answer»

Which of the following vibrates when a musical note is produced by the cymbals in an orchestra?

(a) stretched strings (b) stretched membranes (c) metal plates (d) air columns

Discussion

6805.	Why do we keep water in an earthen pot during summer?
Answer» Why do we keep water in an earthen pot during summer?

Discussion

6806.	Why dogs can hear noises that we can't?
Answer» Why dogs can hear noises that we can't?

Discussion

6807.	If there was no friction, what would happen to moving objects
Answer» If there was no friction, what would happen to moving objects

Discussion

6808.	What enables us to fix nails in a wall and knots to be tied ?
Answer» What enables us to fix nails in a wall and knots to be tied ?

Discussion

6809.	Does static friction double when the applied force is doubled?
Answer» Does static friction double when the applied force is doubled?

Discussion

6810.	It is not possible to stand on a single nail but we have seen some people walking\lying on nails arranged close to each other. Explain how it is possible.
Answer» It is not possible to stand on a single nail but we have seen some people walking\lying on nails arranged close to each other. Explain how it is possible.

Discussion

6811.	When we apply glue to a smooth surface the friction is increased and much force is applied to separate the two surfaces from each other? How is the friction increased?What are the fuses of friction?
Answer» When we apply glue to a smooth surface the friction is increased and much force is applied to separate the two surfaces from each other? How is the friction increased?What are the fuses of friction?

Discussion

6812.	Silver plated vessels and gold plated ornaments are made by _________ method.
Answer» Silver plated vessels and gold plated ornaments are made by _________ method.

Discussion

6813.	A magnet always has ___ pole(s).
Answer» A magnet always has ___ pole(s).

Discussion

6814.	Which of the following measurement is not in S.I. unit?
Answer» Which of the following measurement is not in S.I. unit?

Discussion

6815.	When a book placed on a horizontal desk is pushed towards right, in which direction does the force of friction act on the book?
Answer» When a book placed on a horizontal desk is pushed towards right, in which direction does the force of friction act on the book?

Discussion

6816.	If a mirror forms highly enlarged, real and inverted image, choose the position of the object and the mirror used to form the image.
Answer» If a mirror forms highly enlarged, real and inverted image, choose the position of the object and the mirror used to form the image.

Discussion

6817.	What is the acceleration of a car that starts from rest and attains a speed of 20 ms−1 in 25 seconds?
Answer» What is the acceleration of a car that starts from rest and attains a speed of $20 m s^{- 1}$ in 25 seconds?

Discussion

6818.	On a particle moving on a circular path with a constant speed v, light is thrown from a projector placed at the centre of the circular path. The shadow of the particle is formed on the wall. The velocity of shadow up the wall is
Answer» On a particle moving on a circular path with a constant speed v, light is thrown from a projector placed at the centre of the circular path. The shadow of the particle is formed on the wall. The velocity of shadow up the wall is

Discussion

6819.	If 125 oscillations are produced in 5 seconds, what is the frequency in hertz ?
Answer» If 125 oscillations are produced in 5 seconds, what is the frequency in hertz ?

Discussion

6820.	___ strikes with iron ore to form a permanent magnet.
Answer» ___ strikes with iron ore to form a permanent magnet.

Discussion

6821.	When the free ends of a conductivity tester (made by using a battery connected to a wire wound around a compass) are dipped into a solution, the magnetic needle shows deflection. Can you give the reason for this deflection?
Answer» When the free ends of a conductivity tester (made by using a battery connected to a wire wound around a compass) are dipped into a solution, the magnetic needle shows deflection. Can you give the reason for this deflection?

Discussion

6822.	(a) What is meant by the 'time-period' of a vibrating object? State its unit. (b) Define 'frequency' of a vibrating object. Name the unit in which frequency is measured. (c) A pendulum oscillates 40 times in 4 seconds. Calculate its (i) time-period. and (ii) frequency. Can we hear the sound produced by the oscillations of this pendulum? Give reason for your answer.
Answer» (a) What is meant by the 'time-period' of a vibrating object? State its unit. (b) Define 'frequency' of a vibrating object. Name the unit in which frequency is measured. (c) A pendulum oscillates 40 times in 4 seconds. Calculate its (i) time-period. and (ii) frequency. Can we hear the sound produced by the oscillations of this pendulum? Give reason for your answer.

6822.

(a) What is meant by the 'time-period' of a vibrating object? State its unit. (b) Define 'frequency' of a vibrating object. Name the unit in which frequency is measured. (c) A pendulum oscillates 40 times in 4 seconds. Calculate its (i) time-period. and (ii) frequency. Can we hear the sound produced by the oscillations of this pendulum? Give reason for your answer.

Answer»

(a) What is meant by the 'time-period' of a vibrating object? State its unit.

(b) Define 'frequency' of a vibrating object. Name the unit in which frequency is measured.

(c) A pendulum oscillates 40 times in 4 seconds. Calculate its (i) time-period. and (ii) frequency. Can we hear the sound produced by the oscillations of this pendulum? Give reason for your answer.

Discussion

6823.	Compare the following numbers : (1) 2.7 x 10 raised to the power of 12 ; 1.5 x 10 raised to the power of 8 (2) 4 x 10 raised to the power of 14 ; 3 x 10 raised to the power of 17
Answer» Compare the following numbers : (1) 2.7 x 10 raised to the power of 12 ; 1.5 x 10 raised to the power of 8 (2) 4 x 10 raised to the power of 14 ; 3 x 10 raised to the power of 17

6823.

Compare the following numbers : (1) 2.7 x 10 raised to the power of 12 ; 1.5 x 10 raised to the power of 8 (2) 4 x 10 raised to the power of 14 ; 3 x 10 raised to the power of 17

Answer»

Compare the following numbers :

(1) 2.7 x 10 raised to the power of 12 ; 1.5 x 10 raised to the power of 8

(2) 4 x 10 raised to the power of 14 ; 3 x 10 raised to the power of 17

Discussion

6824.	Why is the shorter lead in LED's always connected to fhe negative terminal of the battery?
Answer» Why is the shorter lead in LED's always connected to fhe negative terminal of the battery?

Discussion

6825.	How does lubrication reduce friction.
Answer» How does lubrication reduce friction.

Discussion

6826.	Q) Why should you not touch electrical appliances with wet hands? A) This is because when we wash our hands with tap water which contains a lot of salt and ions this gets transmitted to our hands . When we touch the electrical appliances with wet hands ,the electric current passes from the appliance till our hands due to which we may get electric shock. Could you please check my answer. Do give your inputs.
Answer» Q) Why should you not touch electrical appliances with wet hands? A) This is because when we wash our hands with tap water which contains a lot of salt and ions this gets transmitted to our hands . When we touch the electrical appliances with wet hands ,the electric current passes from the appliance till our hands due to which we may get electric shock. Could you please check my answer. Do give your inputs.

6826.

Q) Why should you not touch electrical appliances with wet hands? A) This is because when we wash our hands with tap water which contains a lot of salt and ions this gets transmitted to our hands . When we touch the electrical appliances with wet hands ,the electric current passes from the appliance till our hands due to which we may get electric shock. Could you please check my answer. Do give your inputs.

Answer»

Q) Why should you not touch electrical appliances with wet hands?

A) This is because when we wash our hands with tap water which contains a lot of salt and ions this gets transmitted to our hands . When we touch the electrical appliances with wet hands ,the electric current passes from the appliance till our hands due to which we may get electric shock.

Could you please check my answer. Do give your inputs.

Discussion

6827.	Where does liquid exert pressure?
Answer» Where does liquid exert pressure?

Discussion

6828.	John covers a part of the journey at 20 km/hr and the remaining at 70 km/hr, taking a total of 8 hours to cover the distance of 400 km. How many hours he has been driving at 20 km/hr?
Answer» John covers a part of the journey at $20 k m / h r$ and the remaining at $70 k m / h r$ , taking a total of $8$ hours to cover the distance of $400 k m$ . How many hours he has been driving at $20 k m / h r$ ?

Discussion

6829.	Which of the following are the possible refractive indices of optical media?
Answer» Which of the following are the possible refractive indices of optical media?

Discussion

6830.	What is fluid friction?(50 to 70 words){in points}
Answer» What is fluid friction?(50 to 70 words){in points}

Discussion

6831.	Does air around you also show the property of buoyancy? How can you prove it? Buoyancy exhibited by air will be greater or smaller than that shown by water?
Answer» Does air around you also show the property of buoyancy? How can you prove it? Buoyancy exhibited by air will be greater or smaller than that shown by water?

Discussion

6832.	Which of the following is correct? (a) Solids have a definite shape and definite volume. (b) Liquids have a definite volume but no definite shape. (c) Gases have a definite volume but no definite shape. (d) Liquids have both definite shape and definite volume.
Answer» Which of the following is correct? (a) Solids have a definite shape and definite volume. (b) Liquids have a definite volume but no definite shape. (c) Gases have a definite volume but no definite shape. (d) Liquids have both definite shape and definite volume.

6832.

Which of the following is correct? (a) Solids have a definite shape and definite volume. (b) Liquids have a definite volume but no definite shape. (c) Gases have a definite volume but no definite shape. (d) Liquids have both definite shape and definite volume.

Answer»

Which of the following is correct?

(a) Solids have a definite shape and definite volume.

(b) Liquids have a definite volume but no definite shape.

(c) Gases have a definite volume but no definite shape.

(d) Liquids have both definite shape and definite volume.

Discussion

6833.	What is the meaning of thrust
Answer» What is the meaning of thrust

Discussion

6834.	Question 14 How many images of a candle will be formed if it is placed between two parallel plane mirrors separated by 40 cm?
Answer» Question 14 How many images of a candle will be formed if it is placed between two parallel plane mirrors separated by 40 cm?

Discussion

6835.	What will be the effect on the pressure of water if salt is added to it?
Answer» What will be the effect on the pressure of water if salt is added to it?

Discussion

6836.	Question 13 What is the angle of incidence of a ray if the reflected ray is at an angle of 90° to the incident ray?
Answer» Question 13 What is the angle of incidence of a ray if the reflected ray is at an angle of 90° to the incident ray?

Discussion

6837.	Primary cells can be recharged by passing an ___ current through them.
Answer» Primary cells can be recharged by passing an ___ current through them.

Discussion

6838.	An object starts from rest and attains a uniform acceleration of 4 ms−2. What will be its velocity at the end of half a metre?
Answer» An object starts from rest and attains a uniform acceleration of $4 m s^{- 2}$ . What will be its velocity at the end of half a metre?

Discussion

6839.	How much distance can a person hear sound?
Answer» How much distance can a person hear sound?

Discussion

6840.	The decomposition of an electrolyte when electricity is passed through it, is called:
Answer» The decomposition of an electrolyte when electricity is passed through it, is called:

Discussion

6841.	Question 5 A pendulum oscillates 40 times in 4 seconds. Find its time period and frequency.
Answer» Question 5 A pendulum oscillates 40 times in 4 seconds. Find its time period and frequency.

Discussion

6842.	How do we measure friction?
Answer» How do we measure friction?

Discussion

6843.	The unit of amplitude is______.
Answer» The unit of amplitude is______.

Discussion

6844.	The smallest planet of the solar system is: (a) Earth (b) Mars (c) Mercury (d) Saturn
Answer» The smallest planet of the solar system is: (a) Earth (b) Mars (c) Mercury (d) Saturn

6844.

The smallest planet of the solar system is: (a) Earth (b) Mars (c) Mercury (d) Saturn

Answer»

The smallest planet of the solar system is:

(a) Earth

(b) Mars

(c) Mercury

(d) Saturn

Discussion

6845.	Force arises as a result of:
Answer» Force arises as a result of:

Discussion

6846.	When an ebonite rod is rubbed with fur:
Answer» When an ebonite rod is rubbed with fur:

Discussion

6847.	In summer, if a wooden chair and an iron chair both kept in the sun are touched, which of the following will appear warmer?
Answer» In summer, if a wooden chair and an iron chair both kept in the sun are touched, which of the following will appear warmer?

Discussion

6848.	If an object is placed at a distance of 7.5 cm from a plane mirror, how far would it be from its image ?
Answer» If an object is placed at a distance of 7.5 cm from a plane mirror, how far would it be from its image ?

Discussion

6849.	Which of these is/are methods of charging?
Answer» Which of these is/are methods of charging?

Discussion

6850.	What name is given to the maximum displacement of a vibrating body from its central position ?
Answer» What name is given to the maximum displacement of a vibrating body from its central position ?

Discussion

Explore topic-wise InterviewSolutions in .

The largest natural satellite in our solar system belongs to which planet

On one hand you say that when two smooth, even surfaces slide over each other, there is adhesion between them which causes friction. On the other you say that there is no friction between two smooth surfaces. I'm not getting. Mark the word SMOOTH.

What do you mean by sublimation? Explain with an example.

Which of the following vibrates when a musical note is produced by the cymbals in an orchestra? (a) stretched strings (b) stretched membranes (c) metal plates (d) air columns

Why do we keep water in an earthen pot during summer?

Why dogs can hear noises that we can't?

If there was no friction, what would happen to moving objects

What enables us to fix nails in a wall and knots to be tied ?

Does static friction double when the applied force is doubled?

It is not possible to stand on a single nail but we have seen some people walking\lying on nails arranged close to each other. Explain how it is possible.

When we apply glue to a smooth surface the friction is increased and much force is applied to separate the two surfaces from each other? How is the friction increased?What are the fuses of friction?

Silver plated vessels and gold plated ornaments are made by _________ method.

A magnet always has ___ pole(s).

Which of the following measurement is not in S.I. unit?

When a book placed on a horizontal desk is pushed towards right, in which direction does the force of friction act on the book?

If a mirror forms highly enlarged, real and inverted image, choose the position of the object and the mirror used to form the image.

What is the acceleration of a car that starts from rest and attains a speed of 20 ms−1 in 25 seconds?

On a particle moving on a circular path with a constant speed v, light is thrown from a projector placed at the centre of the circular path. The shadow of the particle is formed on the wall. The velocity of shadow up the wall is

If 125 oscillations are produced in 5 seconds, what is the frequency in hertz ?

___ strikes with iron ore to form a permanent magnet.

When the free ends of a conductivity tester (made by using a battery connected to a wire wound around a compass) are dipped into a solution, the magnetic needle shows deflection. Can you give the reason for this deflection?

Compare the following numbers : (1) 2.7 x 10 raised to the power of 12 ; 1.5 x 10 raised to the power of 8 (2) 4 x 10 raised to the power of 14 ; 3 x 10 raised to the power of 17

Why is the shorter lead in LED's always connected to fhe negative terminal of the battery?

How does lubrication reduce friction.

Where does liquid exert pressure?

John covers a part of the journey at 20 km/hr and the remaining at 70 km/hr, taking a total of 8 hours to cover the distance of 400 km. How many hours he has been driving at 20 km/hr?

Which of the following are the possible refractive indices of optical media?

What is fluid friction?(50 to 70 words){in points}

Does air around you also show the property of buoyancy? How can you prove it? Buoyancy exhibited by air will be greater or smaller than that shown by water?

Which of the following is correct? (a) Solids have a definite shape and definite volume. (b) Liquids have a definite volume but no definite shape. (c) Gases have a definite volume but no definite shape. (d) Liquids have both definite shape and definite volume.

What is the meaning of thrust

Question 14 How many images of a candle will be formed if it is placed between two parallel plane mirrors separated by 40 cm?

What will be the effect on the pressure of water if salt is added to it?

Question 13 What is the angle of incidence of a ray if the reflected ray is at an angle of 90° to the incident ray?

Primary cells can be recharged by passing an ___ current through them.

An object starts from rest and attains a uniform acceleration of 4 ms−2. What will be its velocity at the end of half a metre?

How much distance can a person hear sound?

The decomposition of an electrolyte when electricity is passed through it, is called:

Question 5 A pendulum oscillates 40 times in 4 seconds. Find its time period and frequency.

How do we measure friction?

The unit of amplitude is______.

The smallest planet of the solar system is: (a) Earth (b) Mars (c) Mercury (d) Saturn

Force arises as a result of:

When an ebonite rod is rubbed with fur:

In summer, if a wooden chair and an iron chair both kept in the sun are touched, which of the following will appear warmer?

If an object is placed at a distance of 7.5 cm from a plane mirror, how far would it be from its image ?

Which of these is/are methods of charging?

What name is given to the maximum displacement of a vibrating body from its central position ?