9478 + Interview Questions in Physics Page 153 InterviewSolution

7601.	The splitting of white light into its constituent colours is called
Answer» The splitting of white light into its constituent colours is called

Discussion

7602.	When the net force that acts on a mass is 10 N, it accelerates at a rate of 50 cm/s2. Determine its mass.
Answer» When the net force that acts on a mass is 10 N, it accelerates at a rate of $50 c m / s^{2}$ . Determine its mass.

Discussion

7603.	What is meant by the statement "copper is denser than wood"
Answer» What is meant by the statement "copper is denser than wood"

Discussion

7604.	Which of the following is not used to change sliding friction into a much smaller type of rolling friction?
Answer» Which of the following is not used to change sliding friction into a much smaller type of rolling friction?

Discussion

7605.	Describe a pith ball electroscope. How can you use it to test whether a body is charged or uncharged?
Answer» Describe a pith ball electroscope. How can you use it to test whether a body is charged or uncharged?

Discussion

7606.	X is a group of stars which is visible during the summer season in the early part of the night. It can be seen clearly in the month of April in the northern part of the sky. It resembles a bowl with a handle. It also resembles a big kite with a tail. (a) What is the general name of groups of stars like X? (b) Write any two names of X. (c) Is it a part of our solar system? (d) How many bright stars are usually observed in X? (e) Which famous star can be located in the sky with the help of X?
Answer» X is a group of stars which is visible during the summer season in the early part of the night. It can be seen clearly in the month of April in the northern part of the sky. It resembles a bowl with a handle. It also resembles a big kite with a tail. (a) What is the general name of groups of stars like X? (b) Write any two names of X. (c) Is it a part of our solar system? (d) How many bright stars are usually observed in X? (e) Which famous star can be located in the sky with the help of X?

7606.

X is a group of stars which is visible during the summer season in the early part of the night. It can be seen clearly in the month of April in the northern part of the sky. It resembles a bowl with a handle. It also resembles a big kite with a tail. (a) What is the general name of groups of stars like X? (b) Write any two names of X. (c) Is it a part of our solar system? (d) How many bright stars are usually observed in X? (e) Which famous star can be located in the sky with the help of X?

Answer»

X is a group of stars which is visible during the summer season in the early part of the night. It can be seen clearly in the month of April in the northern part of the sky. It resembles a bowl with a handle. It also resembles a big kite with a tail.

(a) What is the general name of groups of stars like X?

(b) Write any two names of X.

(c) Is it a part of our solar system?

(d) How many bright stars are usually observed in X?

(e) Which famous star can be located in the sky with the help of X?

Discussion

7607.	State five uses of artificial satellites.
Answer» State five uses of artificial satellites.

Discussion

7608.	Question 5 A small hole P is made in a piece of cardboard. The hole is illuminated by a touch as shown in the figure. The pencil of light coming out of the hole falls on a mirror. At which point should the eye be placed, so that the hole can be seen?
Answer» Question 5 A small hole P is made in a piece of cardboard. The hole is illuminated by a touch as shown in the figure. The pencil of light coming out of the hole falls on a mirror. At which point should the eye be placed, so that the hole can be seen?

7608.

Question 5 A small hole P is made in a piece of cardboard. The hole is illuminated by a touch as shown in the figure. The pencil of light coming out of the hole falls on a mirror. At which point should the eye be placed, so that the hole can be seen?

Answer»

Question 5

A small hole P is made in a piece of cardboard. The hole is illuminated by a touch as shown in the figure. The pencil of light coming out of the hole falls on a mirror.

At which point should the eye be placed, so that the hole can be seen?

Discussion

7609.	Question 1 (b) Fill in the blank: Image formed by a convex __________ is always virtual and smaller in size.
Answer» Question 1 (b) Fill in the blank: Image formed by a convex __________ is always virtual and smaller in size.

Discussion

7610.	Read the sentence and identify the feminine gender noun from the options. The fairies came down on clouds and took the little girl away on a ride in the clouds.
Answer» Read the sentence and identify the feminine gender noun from the options. The fairies came down on clouds and took the little girl away on a ride in the clouds.

7610.

Read the sentence and identify the feminine gender noun from the options. The fairies came down on clouds and took the little girl away on a ride in the clouds.

Answer»

Read the sentence and identify the feminine gender noun from the options.

The fairies came down on clouds and took the little girl away on a ride in the clouds.

Discussion

7611.	A flute is a
Answer» A flute is a

Discussion

7612.	When we hear a sound, we can identify its source from
Answer» When we hear a sound, we can identify its source from

7612.

When we hear a sound, we can identify its source from

Answer»

When we hear a sound, we can identify its source from

Discussion

7613.	Which of the following mirror has a larger field of view?
Answer» Which of the following mirror has a larger field of view?

Discussion

7614.	Eye lens is an example of _______.
Answer» Eye lens is an example of _______.

Discussion

7615.	An air bubble in a glass slab μ=1.5 is 5 cm deep when viewed from one face and 2cm deep when viewed from the opposite face. The thickness of the glass slab is
Answer» An air bubble in a glass slab $μ = 1.5$ is 5 cm deep when viewed from one face and 2cm deep when viewed from the opposite face. The thickness of the glass slab is

Discussion

7616.	A circular metal disc of diameter 5cm is heated by 500∘C. If the coefficient of linear expansion of metal is 1.8×10−5∘C−1, what will be its final diameter?
Answer» A circular metal disc of diameter $5 c m$ is heated by $500^{\circ} C$ . If the coefficient of linear expansion of metal is $1.8 \times 10^{- 5}^{\circ} C^{- 1}$ , what will be its final diameter?

Discussion

7617.	How will you find out whether an object is charged or not ?
Answer» How will you find out whether an object is charged or not ?

Discussion

7618.	Do all the stars in the sky move? Explain. Suppose a new planet is discovered between Uranus and Neptune. What will its time period be?
Answer» Do all the stars in the sky move? Explain. Suppose a new planet is discovered between Uranus and Neptune. What will its time period be?

Discussion

7619.	Give two examples each where force 1 ) Only tends to stop motion 2 )Changes the direction of motion 3) Changes the shape of body
Answer» Give two examples each where force 1 ) Only tends to stop motion 2 )Changes the direction of motion 3) Changes the shape of body

7619.

Give two examples each where force 1 ) Only tends to stop motion 2 )Changes the direction of motion 3) Changes the shape of body

Answer»

Give two examples each where force

1 ) Only tends to stop motion

2 )Changes the direction of motion

3) Changes the shape of body

Discussion

7620.	Explain the following : (a) The spanner (or wrench) has a long handle. (b) The steering wheel of a vehicle is of large diameter. (c) The hand flour grinder is provided with a handle near the rim. (d) It is easier to open the door by pushing it at its free end. (e) A potter turns his wheel by applying a force through the stick near the rim of wheel.
Answer» Explain the following : (a) The spanner (or wrench) has a long handle. (b) The steering wheel of a vehicle is of large diameter. (c) The hand flour grinder is provided with a handle near the rim. (d) It is easier to open the door by pushing it at its free end. (e) A potter turns his wheel by applying a force through the stick near the rim of wheel.

7620.

Explain the following : (a) The spanner (or wrench) has a long handle. (b) The steering wheel of a vehicle is of large diameter. (c) The hand flour grinder is provided with a handle near the rim. (d) It is easier to open the door by pushing it at its free end. (e) A potter turns his wheel by applying a force through the stick near the rim of wheel.

Answer»

Explain the following :

(a) The spanner (or wrench) has a long handle.

(b) The steering wheel of a vehicle is of large diameter.

(c) The hand flour grinder is provided with a handle near the rim.

(d) It is easier to open the door by pushing it at its free end.

(e) A potter turns his wheel by applying a force through the stick near the rim of wheel.

Discussion

7621.	Kamala tries to open a door by applying force of 3500 gf-cm at the doorknob. If the knob is 60 cm from the hinge, what force (in N) should she apply in order to open the door by pushing it at a distance of 25 cm from the knob?58.8
Answer» Kamala tries to open a door by applying force of $3500 gf-cm$ at the doorknob. If the knob is $60 cm$ from the hinge, what force (in $N$ ) should she apply in order to open the door by pushing it at a distance of $25 cm$ from the knob? 58.8

Discussion

7622.	A boy is standing at a distance of 4 metre in front of a mirror he moves to metre towards the mirror in which direction will the image move towards the mirror or away from it Could you please check my answer Ans . His image would also move to metre towards the mirror .thus the distance of the boy from the mirror and the image of the boy from the mirror would be 2 metres and the total distance of the boy from its image would be 4 metre
Answer» A boy is standing at a distance of 4 metre in front of a mirror he moves to metre towards the mirror in which direction will the image move towards the mirror or away from it Could you please check my answer Ans . His image would also move to metre towards the mirror .thus the distance of the boy from the mirror and the image of the boy from the mirror would be 2 metres and the total distance of the boy from its image would be 4 metre

7622.

A boy is standing at a distance of 4 metre in front of a mirror he moves to metre towards the mirror in which direction will the image move towards the mirror or away from it Could you please check my answer Ans . His image would also move to metre towards the mirror .thus the distance of the boy from the mirror and the image of the boy from the mirror would be 2 metres and the total distance of the boy from its image would be 4 metre

Answer»

A boy is standing at a distance of 4 metre in front of a mirror he moves to metre towards the mirror in which direction will the image move towards the mirror or away from it

Could you please check my answer

Ans . His image would also move to metre towards the mirror .thus the distance of the boy from the mirror and the image of the boy from the mirror would be 2 metres and the total distance of the boy from its image would be 4 metre

Discussion

7623.	Moon has ___ temperature due to the lack of air.
Answer» Moon has ___ temperature due to the lack of air.

Discussion

7624.	A body gets displaced by 6.5 m due to a net force of 12 N. The work done by the force is_____J.
Answer» A body gets displaced by $6.5 m$ due to a net force of $12 N$ . The work done by the force is_____J.

Discussion

7625.	Direction: In each of the following questions, a statements of Assertion (A) is given followed by corresponding Reason (R), just below it. Read the statements carefully and mark the correct answer. Assertion (A): Electromagnets are generally made from soft iron. Reason (R): Soft iron has a high magnetic saturation limit.
Answer» Direction: In each of the following questions, a statements of Assertion (A) is given followed by corresponding Reason (R), just below it. Read the statements carefully and mark the correct answer. Assertion (A): Electromagnets are generally made from soft iron. Reason (R): Soft iron has a high magnetic saturation limit.

7625.

Direction: In each of the following questions, a statements of Assertion (A) is given followed by corresponding Reason (R), just below it. Read the statements carefully and mark the correct answer. Assertion (A): Electromagnets are generally made from soft iron. Reason (R): Soft iron has a high magnetic saturation limit.

Answer»

Direction: In each of the following questions, a statements of Assertion (A) is given followed by corresponding Reason (R), just below it. Read the statements carefully and mark the correct answer.

Assertion (A): Electromagnets are generally made from soft iron.

Reason (R): Soft iron has a high magnetic saturation limit.

Discussion

7626.	Why do trucks have 8 rather than 4 tyres
Answer» Why do trucks have 8 rather than 4 tyres

Discussion

7627.	Explain why, too little or too much light, both are bad for eyes.
Answer» Explain why, too little or too much light, both are bad for eyes.

Discussion

7628.	A construction worker’s helmet slips and falls down when he is 78.4 m above the ground. He hears the sound of the helmet hitting the ground 4.23 seconds after it has slipped. Then find the speed of the sound in air.
Answer» A construction worker’s helmet slips and falls down when he is $78.4 m$ above the ground. He hears the sound of the helmet hitting the ground $4.23$ seconds after it has slipped. Then find the speed of the sound in air.

Discussion

7629.	What is the difference between static friction and limiting friction?
Answer» What is the difference between static friction and limiting friction?

Discussion

7630.	In electrochemical corrosion which of the following could act as an electrical conductor?
Answer» In electrochemical corrosion which of the following could act as an electrical conductor?

Discussion

7631.	How will you show that there is vacuum above the surface of the mercury in a barometer?
Answer» How will you show that there is vacuum above the surface of the mercury in a barometer?

Discussion

7632.	(a) What differences will you hear in a sound if there is an increase in (i) amplitude, and (ii) frequency? (b) Calculate the time period of a pendulum which is vibrating with a frequency of 10 Hertz.
Answer» (a) What differences will you hear in a sound if there is an increase in (i) amplitude, and (ii) frequency? (b) Calculate the time period of a pendulum which is vibrating with a frequency of 10 Hertz.

7632.

(a) What differences will you hear in a sound if there is an increase in (i) amplitude, and (ii) frequency? (b) Calculate the time period of a pendulum which is vibrating with a frequency of 10 Hertz.

Answer»

(a) What differences will you hear in a sound if there is an increase in (i) amplitude, and (ii) frequency?

(b) Calculate the time period of a pendulum which is vibrating with a frequency of 10 Hertz.

Discussion

7633.	What is meant by gravitational force (or force of gravity )? Give its one example.
Answer» What is meant by gravitational force (or force of gravity )? Give its one example.

Discussion

7634.	A sound is produced in an electric bell, when:
Answer» A sound is produced in an electric bell, when:

Discussion

7635.	Fig. 7.22 shows four waves A, B, C, and D. Name the wave which shows (a) a note from a musical instrument, (b) a soft note, (c) a shrill note
Answer» Fig. 7.22 shows four waves A, B, C, and D. Name the wave which shows (a) a note from a musical instrument, (b) a soft note, (c) a shrill note

7635.

Fig. 7.22 shows four waves A, B, C, and D. Name the wave which shows (a) a note from a musical instrument, (b) a soft note, (c) a shrill note

Answer»

Fig. 7.22 shows four waves A, B, C, and D.

Name the wave which shows

(a) a note from a musical instrument,

(b) a soft note,

(c) a shrill note

Discussion

7636.	What is meant by cooling effect?
Answer» What is meant by cooling effect?

Discussion

7637.	The temperature and the dew point in an open room are 20°C and 10°C. If the room temperature drops at 15°C, what will be the new dew point? BOOK ANSWER : 10°C MY SUGGESTION : My answer is also same as book because I think that dew point do not depend on environment temperature. But I want to know that the reason I have mentioned is true or not, if my reason is wrong then why?
Answer» The temperature and the dew point in an open room are 20°C and 10°C. If the room temperature drops at 15°C, what will be the new dew point? BOOK ANSWER : 10°C MY SUGGESTION : My answer is also same as book because I think that dew point do not depend on environment temperature. But I want to know that the reason I have mentioned is true or not, if my reason is wrong then why?

7637.

The temperature and the dew point in an open room are 20°C and 10°C. If the room temperature drops at 15°C, what will be the new dew point? BOOK ANSWER : 10°C MY SUGGESTION : My answer is also same as book because I think that dew point do not depend on environment temperature. But I want to know that the reason I have mentioned is true or not, if my reason is wrong then why?

Answer»

The temperature and the dew point in an open room are 20°C and 10°C. If the room temperature drops at 15°C, what will be the new dew point?

BOOK ANSWER : 10°C

MY SUGGESTION :

My answer is also same as book because I think that dew point do not depend on environment temperature.

But I want to know that the reason I have mentioned is true or not, if my reason is wrong then why?

Discussion

7638.	Why should we use only mirrors for plane mirrors for reflection ,why can't we use a glass or a book for plane surface? Even book is a regular surface.
Answer» Why should we use only mirrors for plane mirrors for reflection ,why can't we use a glass or a book for plane surface? Even book is a regular surface.

Discussion

7639.	Why is rolling friction so convenient
Answer» Why is rolling friction so convenient

Discussion

7640.	Explain how, a hair dresser makes you see hair at the back of your head after the hair cut is complete.
Answer» Explain how, a hair dresser makes you see hair at the back of your head after the hair cut is complete.

Discussion

7641.	What is a satellite? Name the natural satellite of the Earth.
Answer» What is a satellite? Name the natural satellite of the Earth.

Discussion

7642.	In an experiment to find the speed of waves in a rope, a standing wave pattern is established as shown in diagram below. The vibrating end of rope makes 90 vibrations per minute. The speed of the waves is
Answer» In an experiment to find the speed of waves in a rope, a standing wave pattern is established as shown in diagram below. The vibrating end of rope makes 90 vibrations per minute. The speed of the waves is

Discussion

7643.	When a light ray is incident on one of the two mirrors that are placed at right angle to each other, what can be said about the final reflected ray? It is given that the plane of incident ray and the the two normals is same.
Answer» When a light ray is incident on one of the two mirrors that are placed at right angle to each other, what can be said about the final reflected ray? It is given that the plane of incident ray and the the two normals is same.

Discussion

7644.	A girl is cycling and she covers 0.5 km in 2 minutes, next 0.75 km in 3 minutes and last 1 km in 4 minutes. Select the options that correctly mention her average speed.
Answer» A girl is cycling and she covers $0.5 k m$ in $2$ minutes, next $0.75 k m$ in $3$ minutes and last $1$ km in $4$ minutes. Select the options that correctly mention her average speed.

Discussion

7645.	If the speed of a moving object is 5 kmph then, how much distance will it cover in 10 hours?
Answer» If the speed of a moving object is $5 k m p h$ then, how much distance will it cover in $10$ hours?

Discussion

7646.	Choose the correct statement
Answer» Choose the correct statement

Discussion

7647.	It is difficult to cook vegetables on the hills and mountains. Explain the reason.
Answer» It is difficult to cook vegetables on the hills and mountains. Explain the reason.

7647.

It is difficult to cook vegetables on the hills and mountains. Explain the reason.

Answer»

It is difficult to cook vegetables on the hills and mountains. Explain the reason.

Discussion

7648.	Name the instrument that is used in submarines, tanks and also by soldiers in bunkers to see things outside.
Answer» Name the instrument that is used in submarines, tanks and also by soldiers in bunkers to see things outside.

Discussion

7649.	Two plane mirrors are inclined at an angle of 45o with each other. The number of images formed by them when a point sized object is placed on their bisector is :
Answer» Two plane mirrors are inclined at an angle of 45^o with each other. The number of images formed by them when a point sized object is placed on their bisector is :

Discussion

7650.	What happens when an iron rod is inserted into a coil in faradays experiments?
Answer» What happens when an iron rod is inserted into a coil in faradays experiments?

Discussion

Explore topic-wise InterviewSolutions in .

The splitting of white light into its constituent colours is called

When the net force that acts on a mass is 10 N, it accelerates at a rate of 50 cm/s2. Determine its mass.

What is meant by the statement "copper is denser than wood"

Which of the following is not used to change sliding friction into a much smaller type of rolling friction?

Describe a pith ball electroscope. How can you use it to test whether a body is charged or uncharged?

State five uses of artificial satellites.

Question 5 A small hole P is made in a piece of cardboard. The hole is illuminated by a touch as shown in the figure. The pencil of light coming out of the hole falls on a mirror. At which point should the eye be placed, so that the hole can be seen?

Question 1 (b) Fill in the blank: Image formed by a convex __________ is always virtual and smaller in size.

Read the sentence and identify the feminine gender noun from the options. The fairies came down on clouds and took the little girl away on a ride in the clouds.

A flute is a

When we hear a sound, we can identify its source from

Which of the following mirror has a larger field of view?

Eye lens is an example of _______.

An air bubble in a glass slab μ=1.5 is 5 cm deep when viewed from one face and 2cm deep when viewed from the opposite face. The thickness of the glass slab is

A circular metal disc of diameter 5cm is heated by 500∘C. If the coefficient of linear expansion of metal is 1.8×10−5∘C−1, what will be its final diameter?

How will you find out whether an object is charged or not ?

Do all the stars in the sky move? Explain. Suppose a new planet is discovered between Uranus and Neptune. What will its time period be?

Give two examples each where force 1 ) Only tends to stop motion 2 )Changes the direction of motion 3) Changes the shape of body

Kamala tries to open a door by applying force of 3500 gf-cm at the doorknob. If the knob is 60 cm from the hinge, what force (in N) should she apply in order to open the door by pushing it at a distance of 25 cm from the knob?58.8

Moon has ___ temperature due to the lack of air.

A body gets displaced by 6.5 m due to a net force of 12 N. The work done by the force is_____J.

Why do trucks have 8 rather than 4 tyres

Explain why, too little or too much light, both are bad for eyes.

A construction worker’s helmet slips and falls down when he is 78.4 m above the ground. He hears the sound of the helmet hitting the ground 4.23 seconds after it has slipped. Then find the speed of the sound in air.

What is the difference between static friction and limiting friction?

In electrochemical corrosion which of the following could act as an electrical conductor?

How will you show that there is vacuum above the surface of the mercury in a barometer?

(a) What differences will you hear in a sound if there is an increase in (i) amplitude, and (ii) frequency? (b) Calculate the time period of a pendulum which is vibrating with a frequency of 10 Hertz.

What is meant by gravitational force (or force of gravity )? Give its one example.

A sound is produced in an electric bell, when:

Fig. 7.22 shows four waves A, B, C, and D. Name the wave which shows (a) a note from a musical instrument, (b) a soft note, (c) a shrill note

What is meant by cooling effect?

Why should we use only mirrors for plane mirrors for reflection ,why can't we use a glass or a book for plane surface? Even book is a regular surface.

Why is rolling friction so convenient

Explain how, a hair dresser makes you see hair at the back of your head after the hair cut is complete.

What is a satellite? Name the natural satellite of the Earth.

In an experiment to find the speed of waves in a rope, a standing wave pattern is established as shown in diagram below. The vibrating end of rope makes 90 vibrations per minute. The speed of the waves is

When a light ray is incident on one of the two mirrors that are placed at right angle to each other, what can be said about the final reflected ray? It is given that the plane of incident ray and the the two normals is same.

A girl is cycling and she covers 0.5 km in 2 minutes, next 0.75 km in 3 minutes and last 1 km in 4 minutes. Select the options that correctly mention her average speed.

If the speed of a moving object is 5 kmph then, how much distance will it cover in 10 hours?

Choose the correct statement

It is difficult to cook vegetables on the hills and mountains. Explain the reason.

Name the instrument that is used in submarines, tanks and also by soldiers in bunkers to see things outside.

Two plane mirrors are inclined at an angle of 45o with each other. The number of images formed by them when a point sized object is placed on their bisector is :

What happens when an iron rod is inserted into a coil in faradays experiments?