9478 + Interview Questions in Physics Page 185 InterviewSolution

9201.	At which area is the surface charge density maximum on a conductor?
Answer» At which area is the surface charge density maximum on a conductor?

Discussion

9202.	Question 10 Will force of friction come into play when a rain drop rolls down a glass window pane?
Answer» Question 10 Will force of friction come into play when a rain drop rolls down a glass window pane?

Discussion

9203.	A bottle kept on a table started leaking when two holes were made at the same level. This is because:
Answer» A bottle kept on a table started leaking when two holes were made at the same level. This is because:

Discussion

9204.	Aluminium and copper metals are used in making electrical wires because:
Answer» Aluminium and copper metals are used in making electrical wires because:

Discussion

9205.	Phases of the Moon occur because: (a) we can see only that part of the Moon which reflects light towards us. (b) our distance from the moon keeps changing. (c) the shadow of the Earth covers only a part of the moon's surface. (d) the thickness of the moon's atmosphere is not constant.
Answer» Phases of the Moon occur because: (a) we can see only that part of the Moon which reflects light towards us. (b) our distance from the moon keeps changing. (c) the shadow of the Earth covers only a part of the moon's surface. (d) the thickness of the moon's atmosphere is not constant.

9205.

Phases of the Moon occur because: (a) we can see only that part of the Moon which reflects light towards us. (b) our distance from the moon keeps changing. (c) the shadow of the Earth covers only a part of the moon's surface. (d) the thickness of the moon's atmosphere is not constant.

Answer»

Phases of the Moon occur because:

(a) we can see only that part of the Moon which reflects light towards us.

(b) our distance from the moon keeps changing.

(c) the shadow of the Earth covers only a part of the moon's surface.

(d) the thickness of the moon's atmosphere is not constant.

Discussion

9206.	What is the circular opening in the middle of iris known as?
Answer» What is the circular opening in the middle of iris known as?

Discussion

9207.	The amplitude of a sound wave determines its:
Answer» The amplitude of a sound wave determines its:

Discussion

9208.	If an object is placed between two parallel mirrors, then the number of images formed will be:
Answer» If an object is placed between two parallel mirrors, then the number of images formed will be:

Discussion

9209.	A bullet is fired at a speed of 300 ms−1 from a gun of mass 2 kg. If the gun recoils with a speed of 2.4 ms−1, find the mass of the bullet.
Answer» A bullet is fired at a speed of $300 m s^{- 1}$ from a gun of mass $2 k g$ . If the gun recoils with a speed of $2.4 m s^{- 1}$ , find the mass of the bullet.

Discussion

9210.	A ray of light is incident at 60∘ on glass-air interface. What will happen to the ray? μg = √2, μa = 1
Answer» A ray of light is incident at $60^{\circ}$ on glass-air interface. What will happen to the ray? $μ_{g}$ = $\sqrt{2}$ , $μ_{a}$ = 1

9210.

A ray of light is incident at 60∘ on glass-air interface. What will happen to the ray? μg = √2, μa = 1

Answer»

A ray of light is incident at $60^{\circ}$ on glass-air interface. What will happen to the ray?

$μ_{g}$ = $\sqrt{2}$ , $μ_{a}$ = 1

Discussion

9211.	There are two school bags A & B. Bag A is provided with a broader strap, while bag B is provided with a thinner strap. For the same load, a school boy likes bag A as he is comfortable with it; but with bag B, he develops a pain in his shoulders. This is because:
Answer» There are two school bags A & B. Bag A is provided with a broader strap, while bag B is provided with a thinner strap. For the same load, a school boy likes bag A as he is comfortable with it; but with bag B, he develops a pain in his shoulders. This is because:

Discussion

9212.	An elastic rubber band is stretched between two points. Will it produce any sound?
Answer» An elastic rubber band is stretched between two points. Will it produce any sound?

Discussion

9213.	A car is moving with a speed of 15kmh−1 and another identical car is moving with a speed of 30kmh−1. Ratio of their kinetic energies will be :
Answer» A car is moving with a speed of $15 k m h^{- 1}$ and another identical car is moving with a speed of $30 k m h^{- 1}$ . Ratio of their kinetic energies will be :

Discussion

9214.	For a given potential difference, the wider the cross-section of a conductor, the higher will be the
Answer» For a given potential difference, the wider the cross-section of a conductor, the higher will be the

Discussion

9215.	How electric charges generated by rubbing are different from the charges that make a bulb glow? [3 MARKS]
Answer» How electric charges generated by rubbing are different from the charges that make a bulb glow? [3 MARKS]

Discussion

9216.	An object of mass 1 kg is at rest. A constant force of 10 N is applied on it for 2 seconds. Find the work done by the force on the object.
Answer» An object of mass $1 k g$ is at rest. A constant force of $10 N$ is applied on it for 2 seconds. Find the work done by the force on the object.

Discussion

9217.	All molecules of a liquid take part in the process of evaporation.
Answer» All molecules of a liquid take part in the process of evaporation.

Discussion

9218.	In a science fiction film shows humans of one spaceship in outer space hear the sound of an exploding star. Validate the physics of this film.
Answer» In a science fiction film shows humans of one spaceship in outer space hear the sound of an exploding star. Validate the physics of this film.

Discussion

9219.	Explain why, the soles of our shoes wear out gradually.
Answer» Explain why, the soles of our shoes wear out gradually.

Discussion

9220.	Which of the following statement(s) is/are true about magnets?
Answer» Which of the following statement(s) is/are true about magnets?

Discussion

9221.	A negatively charged object repels another charged object held near it. What is the nature of charge on the other object ?
Answer» A negatively charged object repels another charged object held near it. What is the nature of charge on the other object ?

Discussion

9222.	Irregular reflection is also known as ___ reflection.
Answer» Irregular reflection is also known as ___ reflection.

Discussion

9223.	'Say no to crackers '. Comment on it.
Answer» 'Say no to crackers '. Comment on it.

Discussion

9224.	Contact and non contact forces in nature?
Answer» Contact and non contact forces in nature?

Discussion

9225.	The pendulum is released from P. It takes 0.2 s to swing from P to Q and takes another 0.2 s to swing from Q to R. The pendulum is at its lowest point at R. What is the frequency of pendulum?
Answer» The pendulum is released from P. It takes 0.2 s to swing from P to Q and takes another 0.2 s to swing from Q to R. The pendulum is at its lowest point at R. What is the frequency of pendulum?

Discussion

9226.	Find the value of a in 3 - square root 5 / 3 + 2 square root 5 = a square root 5 - 19/11
Answer» Find the value of a in 3 - square root 5 / 3 + 2 square root 5 = a square root 5 - 19/11

Discussion

9227.	write an activity to verify the second law of refelection (the incident ray , the normal at the point of incidence and the reflected ray all lie in the same plane)
Answer» write an activity to verify the second law of refelection (the incident ray , the normal at the point of incidence and the reflected ray all lie in the same plane)

Discussion

9228.	Question 4 (b) The planet which appears reddish in colour is _________.
Answer» Question 4 (b) The planet which appears reddish in colour is _________.

9228.

Question 4 (b) The planet which appears reddish in colour is _________.

Answer»

Question 4 (b)

The planet which appears reddish in colour is _________.

Discussion

9229.	Electroplating is a process of
Answer» Electroplating is a process of

Discussion

9230.	Pls explain electrolysis in detail.
Answer» Pls explain electrolysis in detail.

Discussion

9231.	am × an = a______
Answer» a^m× aⁿ = a^______

Discussion

9232.	The mass of a density bottle is 100 g when empty. It weighs 175 g when filled with water and 150 g when filled with oil. What is the relative density of oil?
Answer» The mass of a density bottle is $100 g$ when empty. It weighs $175 g$ when filled with water and $150 g$ when filled with oil. What is the relative density of oil?

Discussion

9233.	Figure shows a ball of mass m connected with two ideal springs of force constant k, kept in equilibrium on a smooth incline, suddenly right spring is cut. What is magnitude of instantaneous acceleration of ball?
Answer» Figure shows a ball of mass m connected with two ideal springs of force constant k, kept in equilibrium on a smooth incline, suddenly right spring is cut. What is magnitude of instantaneous acceleration of ball?

9233.

Figure shows a ball of mass m connected with two ideal springs of force constant k, kept in equilibrium on a smooth incline, suddenly right spring is cut. What is magnitude of instantaneous acceleration of ball?

Answer»

Figure shows a ball of mass m connected with two ideal springs of force constant k, kept in equilibrium on a smooth incline, suddenly right spring is cut. What is magnitude of instantaneous acceleration of ball?

Discussion

9234.	What is evaporation? Explain it on the basis of the molecular motion.
Answer» What is evaporation? Explain it on the basis of the molecular motion.

Discussion

9235.	Which of the following are the characteristics of mechanical waves?
Answer» Which of the following are the characteristics of mechanical waves?

Discussion

9236.	How can we know that which thing or body has positive or negative charge? How can we identify the nature of charge?
Answer» How can we know that which thing or body has positive or negative charge? How can we identify the nature of charge?

Discussion

9237.	What is the direction of force of friction acting on a moving object?
Answer» What is the direction of force of friction acting on a moving object?

Discussion

9238.	Explain the process of electroplating copper over iron.
Answer» Explain the process of electroplating copper over iron.

Discussion

9239.	The airplane have air pressure nearly about the pressure that we are taking on the earth when we are standing on the ground but the pressure outside the airplane is very or lesser then why we don't get crushed inside the airplane?
Answer» The airplane have air pressure nearly about the pressure that we are taking on the earth when we are standing on the ground but the pressure outside the airplane is very or lesser then why we don't get crushed inside the airplane?

Discussion

9240.	Why is rolling friction is better than slliding friction ?
Answer» Why is rolling friction is better than slliding friction ?

Discussion

9241.	Why pole appear to be stationary at night while other stars appear to move from east to west?
Answer» Why pole appear to be stationary at night while other stars appear to move from east to west?

Discussion

9242.	What do you understand by electrolysis? Can you explain why milk is capable of conducting electricity as opposed to pure water? [3 MARKS]
Answer» What do you understand by electrolysis? Can you explain why milk is capable of conducting electricity as opposed to pure water? [3 MARKS]

Discussion

9243.	What will happen if the source of light emitting light is moving in the speed of light in the direction of light itself?will we be able to see the light?
Answer» What will happen if the source of light emitting light is moving in the speed of light in the direction of light itself?will we be able to see the light?

Discussion

9244.	On the Celsius scale the absolute zero of temperature is at:
Answer» On the Celsius scale the absolute zero of temperature is at:

Discussion

9245.	Which of the following is incorrectly matched?
Answer» Which of the following is incorrectly matched?

Discussion

9246.	In galvanization, iron is coated with a layer of:
Answer» In galvanization, iron is coated with a layer of:

Discussion

9247.	Which has a higher refractive index, cooler air or hotter air?
Answer» Which has a higher refractive index, cooler air or hotter air?

Discussion

9248.	Two bodies are in equilibrium when suspended in water from the arms of a balance. The mass of one body is 36 g and its density is 9g / cm3is
Answer» Two bodies are in equilibrium when suspended in water from the arms of a balance. The mass of one body is 36 g and its density is 9g / $c m^{3}$ is

Discussion

9249.	A heavy mass is attached to a thin wire and is whirled in a vertical circle. The wire is most likely to break
Answer» A heavy mass is attached to a thin wire and is whirled in a vertical circle. The wire is most likely to break

Discussion

9250.	(a) Why a sound cannot be heard on the moon (b) How do astronauts talk to one another on the surface of moon and why ?
Answer» (a) Why a sound cannot be heard on the moon (b) How do astronauts talk to one another on the surface of moon and why ?

9250.

(a) Why a sound cannot be heard on the moon (b) How do astronauts talk to one another on the surface of moon and why ?

Answer»

(a) Why a sound cannot be heard on the moon

(b) How do astronauts talk to one another on the surface of moon and why ?

Discussion

Explore topic-wise InterviewSolutions in .

At which area is the surface charge density maximum on a conductor?

Question 10 Will force of friction come into play when a rain drop rolls down a glass window pane?

A bottle kept on a table started leaking when two holes were made at the same level. This is because:

Aluminium and copper metals are used in making electrical wires because:

Phases of the Moon occur because: (a) we can see only that part of the Moon which reflects light towards us. (b) our distance from the moon keeps changing. (c) the shadow of the Earth covers only a part of the moon's surface. (d) the thickness of the moon's atmosphere is not constant.

What is the circular opening in the middle of iris known as?

The amplitude of a sound wave determines its:

If an object is placed between two parallel mirrors, then the number of images formed will be:

A bullet is fired at a speed of 300 ms−1 from a gun of mass 2 kg. If the gun recoils with a speed of 2.4 ms−1, find the mass of the bullet.

A ray of light is incident at 60∘ on glass-air interface. What will happen to the ray? μg = √2, μa = 1

There are two school bags A &amp; B. Bag A is provided with a broader strap, while bag B is provided with a thinner strap. For the same load, a school boy likes bag A as he is comfortable with it; but with bag B, he develops a pain in his shoulders. This is because:

An elastic rubber band is stretched between two points. Will it produce any sound?

A car is moving with a speed of 15kmh−1 and another identical car is moving with a speed of 30kmh−1. Ratio of their kinetic energies will be :

For a given potential difference, the wider the cross-section of a conductor, the higher will be the

How electric charges generated by rubbing are different from the charges that make a bulb glow? [3 MARKS]

An object of mass 1 kg is at rest. A constant force of 10 N is applied on it for 2 seconds. Find the work done by the force on the object.

All molecules of a liquid take part in the process of evaporation.

In a science fiction film shows humans of one spaceship in outer space hear the sound of an exploding star. Validate the physics of this film.

Explain why, the soles of our shoes wear out gradually.

Which of the following statement(s) is/are true about magnets?

A negatively charged object repels another charged object held near it. What is the nature of charge on the other object ?

Irregular reflection is also known as ___ reflection.

'Say no to crackers '. Comment on it.

Contact and non contact forces in nature?

The pendulum is released from P. It takes 0.2 s to swing from P to Q and takes another 0.2 s to swing from Q to R. The pendulum is at its lowest point at R. What is the frequency of pendulum?

Find the value of a in 3 - square root 5 / 3 + 2 square root 5 = a square root 5 - 19/11

write an activity to verify the second law of refelection (the incident ray , the normal at the point of incidence and the reflected ray all lie in the same plane)

Question 4 (b) The planet which appears reddish in colour is _________.

Electroplating is a process of

Pls explain electrolysis in detail.

am × an = a______

The mass of a density bottle is 100 g when empty. It weighs 175 g when filled with water and 150 g when filled with oil. What is the relative density of oil?

Figure shows a ball of mass m connected with two ideal springs of force constant k, kept in equilibrium on a smooth incline, suddenly right spring is cut. What is magnitude of instantaneous acceleration of ball?

What is evaporation? Explain it on the basis of the molecular motion.

Which of the following are the characteristics of mechanical waves?

How can we know that which thing or body has positive or negative charge? How can we identify the nature of charge?

What is the direction of force of friction acting on a moving object?

Explain the process of electroplating copper over iron.

The airplane have air pressure nearly about the pressure that we are taking on the earth when we are standing on the ground but the pressure outside the airplane is very or lesser then why we don't get crushed inside the airplane?

Why is rolling friction is better than slliding friction ?

Why pole appear to be stationary at night while other stars appear to move from east to west?

What do you understand by electrolysis? Can you explain why milk is capable of conducting electricity as opposed to pure water? [3 MARKS]

What will happen if the source of light emitting light is moving in the speed of light in the direction of light itself?will we be able to see the light?

On the Celsius scale the absolute zero of temperature is at:

Which of the following is incorrectly matched?

In galvanization, iron is coated with a layer of:

Which has a higher refractive index, cooler air or hotter air?

Two bodies are in equilibrium when suspended in water from the arms of a balance. The mass of one body is 36 g and its density is 9g / cm3is

A heavy mass is attached to a thin wire and is whirled in a vertical circle. The wire is most likely to break

(a) Why a sound cannot be heard on the moon (b) How do astronauts talk to one another on the surface of moon and why ?

There are two school bags A & B. Bag A is provided with a broader strap, while bag B is provided with a thinner strap. For the same load, a school boy likes bag A as he is comfortable with it; but with bag B, he develops a pain in his shoulders. This is because: