9478 + Interview Questions in Physics Page 183 InterviewSolution

9101.	Question 12 In the picture of the rotating earth given below mark the position of the pole star.
Answer» Question 12 In the picture of the rotating earth given below mark the position of the pole star.

Discussion

9102.	The moment of a force of 25 N about a point is 2.5 N m. Find the perpendicular distance of force from that point.
Answer» The moment of a force of 25 N about a point is 2.5 N m. Find the perpendicular distance of force from that point.

Discussion

9103.	Where does the principal of drag aplies?
Answer» Where does the principal of drag aplies?

Discussion

9104.	The area of base of a cylindrical vessel is 300cmsquare water (density = 1000kg m-3 ) is poured into it up to a depth of 6cm. Calculate The pressure The thrust of water on the base.(g=10ms-2)
Answer» The area of base of a cylindrical vessel is 300cmsquare water (density = 1000kg m-3 ) is poured into it up to a depth of 6cm. Calculate The pressure The thrust of water on the base.(g=10ms-2)

9104.

The area of base of a cylindrical vessel is 300cmsquare water (density = 1000kg m-3 ) is poured into it up to a depth of 6cm. Calculate The pressure The thrust of water on the base.(g=10ms-2)

Answer»

The area of base of a cylindrical vessel is 300cmsquare water (density = 1000kg m-3 ) is poured into it up to a depth of 6cm.

Calculate

The pressure

The thrust of water on the base.(g=10ms-2)

Discussion

9105.	Rita can see herself when she stands in front of a mirror but she cannot see herself when she looks at a bulletin board? Explain why
Answer» Rita can see herself when she stands in front of a mirror but she cannot see herself when she looks at a bulletin board? Explain why

Discussion

9106.	What is the tall device which contains plane mirror and can be used to see over the heads of crowds ( say,as in a football match)
Answer» What is the tall device which contains plane mirror and can be used to see over the heads of crowds ( say,as in a football match)

Discussion

9107.	What are volts,watt and amtier
Answer» What are volts,watt and amtier

Discussion

9108.	What is the full form of ∠i and ∠ r? What is the relation between them?
Answer» What is the full form of $∠ i a n d ∠ r ?$ What is the relation between them?

Discussion

9109.	Two uncharged bodies when rubbed together get charged. This is because of:
Answer» Two uncharged bodies when rubbed together get charged. This is because of:

Discussion

9110.	A block of wood is so loaded that it just floats in water at room temperature. What change will occur in the state of floatation, if (a) some salt is added to water, (b) water is heated ? Give reason.
Answer» A block of wood is so loaded that it just floats in water at room temperature. What change will occur in the state of floatation, if (a) some salt is added to water, (b) water is heated ? Give reason.

Discussion

9111.	The friction which comes into play once an object starts moving on a table is called as?
Answer» The friction which comes into play once an object starts moving on a table is called as?

Discussion

9112.	Which of the following is used in a Kaleidoscope?
Answer» Which of the following is used in a Kaleidoscope?

Discussion

9113.	Explain why, wheels are so useful.
Answer» Explain why, wheels are so useful.

Discussion

9114.	When the current in a conductor is doubled, keeping other parameters constant, the heat generated in it will become ___ times.
Answer» When the current in a conductor is doubled, keeping other parameters constant, the heat generated in it will become ___ times.

Discussion

9115.	A ray of light incident on an angle of 35° on the plane mirror. Find the angle of incidence.
Answer» A ray of light incident on an angle of 35° on the plane mirror. Find the angle of incidence.

Discussion

9116.	Mass of the football = 450g thickness of the rubber = 3cm height of water 💦 column without football ⚽️ = 16 cm height of Water 💧 column with football = 25cm find the density of football as well as the rubber of the football
Answer» Mass of the football = 450g thickness of the rubber = 3cm height of water 💦 column without football ⚽️ = 16 cm height of Water 💧 column with football = 25cm find the density of football as well as the rubber of the football

9116.

Mass of the football = 450g thickness of the rubber = 3cm height of water 💦 column without football ⚽️ = 16 cm height of Water 💧 column with football = 25cm find the density of football as well as the rubber of the football

Answer»

Mass of the football = 450g

thickness of the rubber = 3cm

height of water 💦 column without football ⚽️ = 16 cm

height of Water 💧 column with football = 25cm

find the density of football as well as the rubber of the football

Discussion

9117.	State the laws of motion.
Answer» State the laws of motion.

Discussion

9118.	Which force is responsible for the wearing out of car tyres?
Answer» Which force is responsible for the wearing out of car tyres?

Discussion

9119.	The formation of mirage is a consequence of :
Answer» The formation of mirage is a consequence of :

Discussion

9120.	What part protects eyes from any object entering the eye and also shut out light when not required?
Answer» What part protects eyes from any object entering the eye and also shut out light when not required?

Discussion

9121.	Question 4 (e) Fill in the blank with a suitable word. Shrillness of a sound is determined by the _______ of vibration.
Answer» Question 4 (e) Fill in the blank with a suitable word. Shrillness of a sound is determined by the _______ of vibration.

Discussion

9122.	If we apply a force on a rigid object in the opposite direction of its motion then the speed of the object will ___ .
Answer» If we apply a force on a rigid object in the opposite direction of its motion then the speed of the object will ___ .

Discussion

9123.	What is electric discharged
Answer» What is electric discharged

Discussion

9124.	. Name the force acting on a plastic bucket containing water held above ground level in your hands, Discuss why the forces on the bucket do not bring a change in its state of motion.
Answer» . Name the force acting on a plastic bucket containing water held above ground level in your hands, Discuss why the forces on the bucket do not bring a change in its state of motion.

Discussion

9125.	Why overhead electric cables are made of aluminium and not copper ?
Answer» Why overhead electric cables are made of aluminium and not copper ?

Discussion

9126.	Why sound produced by the balloon related to the tunder ?
Answer» Why sound produced by the balloon related to the tunder ?

Discussion

9127.	Which of the following is not a member of the solar system? (a) An asteroid (b) A satellite (c) A constellation (d) Earth
Answer» Which of the following is not a member of the solar system? (a) An asteroid (b) A satellite (c) A constellation (d) Earth

9127.

Which of the following is not a member of the solar system? (a) An asteroid (b) A satellite (c) A constellation (d) Earth

Answer»

Which of the following is not a member of the solar system?

(a) An asteroid

(b) A satellite

(c) A constellation

(d) Earth

Discussion

9128.	Which planet has been categorized as dwarf planet.
Answer» Which planet has been categorized as dwarf planet.

Discussion

9129.	Rahul is standing in front of a mirror at a distance of 15 m. His image will form at a distance of
Answer» Rahul is standing in front of a mirror at a distance of 15 m. His image will form at a distance of

Discussion

9130.	How much thrust will be required to exert a pressure of 20,000 Pa on an area of 1cm2?
Answer» How much thrust will be required to exert a pressure of 20,000 Pa on an area of $1 c m^{2}$ ?

Discussion

9131.	Why do leaves fall due to the wind?
Answer» Why do leaves fall due to the wind?

Discussion

9132.	The time period of a sound wave is 0.02 s. What is its frequency in Hz?50
Answer» The time period of a sound wave is $0.02 s$ . What is its frequency in $Hz$ ? 50

Discussion

9133.	The sound is an example of ___.
Answer» The sound is an example of ___.

Discussion

9134.	Why is it dangerous to touch a working electrical appliance with wet hands ?
Answer» Why is it dangerous to touch a working electrical appliance with wet hands ?

Discussion

9135.	Name the member of the Solar System which appears in the sky like a bright ball of light with a long, glowing tail.
Answer» Name the member of the Solar System which appears in the sky like a bright ball of light with a long, glowing tail.

Discussion

9136.	A car moves along the periphery of a square field of side 10 meters. He completes travelling one side in 40 seconds. What will be the magnitude of distance and displacement at the end of 2min and 20 seconds ?
Answer» A car moves along the periphery of a square field of side 10 meters. He completes travelling one side in 40 seconds. What will be the magnitude of distance and displacement at the end of 2min and 20 seconds ?

Discussion

9137.	A pressure of 10 kPa acts on an area of 0.3 m2. The force acting on the area will be : (a) 3000 N (b) 30 N (c) 3 N (d) 300 N
Answer» A pressure of 10 kPa acts on an area of 0.3 $m^{2}$ . The force acting on the area will be : (a) 3000 N (b) 30 N (c) 3 N (d) 300 N

Discussion

9138.	What is the name of very high frequency sounds which cannot be heard by the human ear?
Answer» What is the name of very high frequency sounds which cannot be heard by the human ear?

Discussion

9139.	A glass rod is rubbed with silk cloth. What type of charge is acquired by (a) silk cloth, (b) glass rod?
Answer» A glass rod is rubbed with silk cloth. What type of charge is acquired by (a) silk cloth, (b) glass rod?

Discussion

9140.	(a) Which effect of electric current is utilised when a thin layer of chromium metal is deposited on an iron tap? What is this process known as? (b) For electroplating copper on an iron object, which terminal of the battery (positive or negative) is connected to the iron object? Also, name the electrolyte you will use for this purpose.
Answer» (a) Which effect of electric current is utilised when a thin layer of chromium metal is deposited on an iron tap? What is this process known as? (b) For electroplating copper on an iron object, which terminal of the battery (positive or negative) is connected to the iron object? Also, name the electrolyte you will use for this purpose.

Discussion

9141.	A sound produced by the mixture of several frequencies is called
Answer» A sound produced by the mixture of several frequencies is called

Discussion

9142.	An athlete completes one round of a circular track of radius R in 40 sec . What will be his displacement at the end of 2 minutes 20seconds?
Answer» An athlete completes one round of a circular track of radius R in 40 sec . What will be his displacement at the end of 2 minutes 20seconds?

Discussion

9143.	A boy while playing under a mango tree saw a mango falling in front of him. This is due to the force of:
Answer» A boy while playing under a mango tree saw a mango falling in front of him. This is due to the force of:

Discussion

9144.	The density of seawater is 1024 kg/m3. The pressure at a depth of 5 m below the surface of the sea is___ N/m2
Answer» The density of seawater is $1024 k g / m^{3}$ . The pressure at a depth of $5 m$ below the surface of the sea is___ $N / m^{2}$

Discussion

9145.	How is electroplating used to give to an object a property which originally the metalic object lacks? Give an example. [2 MARKS]
Answer» How is electroplating used to give to an object a property which originally the metalic object lacks? Give an example. [2 MARKS]

Discussion

9146.	We know that air is a poor conductor of electricity. Then how do the electric discharge take place during lightning? [3 MARKS]
Answer» We know that air is a poor conductor of electricity. Then how do the electric discharge take place during lightning? [3 MARKS]

Discussion

9147.	Name the constellation which reminds us of a large ladle or a question mark in the night sky.
Answer» Name the constellation which reminds us of a large ladle or a question mark in the night sky.

Discussion

9148.	Which of the following can be used together to measure the length of a zig-zag path?
Answer» Which of the following can be used together to measure the length of a zig-zag path?

Discussion

9149.	When we rub one of the given objects on dry hair and place it close to small pieces of paper, they get attracted. Spot that object. Give reason why only that object attracts and other objects don't attract. (i) Metal pen (ii) Finger of hand (iii) Plastic scale [3 MARKS]
Answer» When we rub one of the given objects on dry hair and place it close to small pieces of paper, they get attracted. Spot that object. Give reason why only that object attracts and other objects don't attract. (i) Metal pen (ii) Finger of hand (iii) Plastic scale [3 MARKS]

Discussion

9150.	A strong current of water turns the blades of a water turbine, because it possesses :
Answer» A strong current of water turns the blades of a water turbine, because it possesses :

Discussion

Explore topic-wise InterviewSolutions in .

Question 12 In the picture of the rotating earth given below mark the position of the pole star.

The moment of a force of 25 N about a point is 2.5 N m. Find the perpendicular distance of force from that point.

Where does the principal of drag aplies?

The area of base of a cylindrical vessel is 300cmsquare water (density = 1000kg m-3 ) is poured into it up to a depth of 6cm. Calculate The pressure The thrust of water on the base.(g=10ms-2)

Rita can see herself when she stands in front of a mirror but she cannot see herself when she looks at a bulletin board? Explain why

What is the tall device which contains plane mirror and can be used to see over the heads of crowds ( say,as in a football match)

What are volts,watt and amtier

What is the full form of ∠i and ∠ r? What is the relation between them?

Two uncharged bodies when rubbed together get charged. This is because of:

A block of wood is so loaded that it just floats in water at room temperature. What change will occur in the state of floatation, if (a) some salt is added to water, (b) water is heated ? Give reason.

The friction which comes into play once an object starts moving on a table is called as?

Which of the following is used in a Kaleidoscope?

Explain why, wheels are so useful.

When the current in a conductor is doubled, keeping other parameters constant, the heat generated in it will become ___ times.

A ray of light incident on an angle of 35° on the plane mirror. Find the angle of incidence.

Mass of the football = 450g thickness of the rubber = 3cm height of water 💦 column without football ⚽️ = 16 cm height of Water 💧 column with football = 25cm find the density of football as well as the rubber of the football

State the laws of motion.

Which force is responsible for the wearing out of car tyres?

The formation of mirage is a consequence of :

What part protects eyes from any object entering the eye and also shut out light when not required?

Question 4 (e) Fill in the blank with a suitable word. Shrillness of a sound is determined by the _______ of vibration.

If we apply a force on a rigid object in the opposite direction of its motion then the speed of the object will ___ .

What is electric discharged

. Name the force acting on a plastic bucket containing water held above ground level in your hands, Discuss why the forces on the bucket do not bring a change in its state of motion.

Why overhead electric cables are made of aluminium and not copper ?

Why sound produced by the balloon related to the tunder ?

Which of the following is not a member of the solar system? (a) An asteroid (b) A satellite (c) A constellation (d) Earth

Which planet has been categorized as dwarf planet.

Rahul is standing in front of a mirror at a distance of 15 m. His image will form at a distance of

How much thrust will be required to exert a pressure of 20,000 Pa on an area of 1cm2?

Why do leaves fall due to the wind?

The time period of a sound wave is 0.02 s. What is its frequency in Hz?50

The sound is an example of ___.

Why is it dangerous to touch a working electrical appliance with wet hands ?

Name the member of the Solar System which appears in the sky like a bright ball of light with a long, glowing tail.

A car moves along the periphery of a square field of side 10 meters. He completes travelling one side in 40 seconds. What will be the magnitude of distance and displacement at the end of 2min and 20 seconds ?

A pressure of 10 kPa acts on an area of 0.3 m2. The force acting on the area will be : (a) 3000 N (b) 30 N (c) 3 N (d) 300 N

What is the name of very high frequency sounds which cannot be heard by the human ear?

A glass rod is rubbed with silk cloth. What type of charge is acquired by (a) silk cloth, (b) glass rod?

A sound produced by the mixture of several frequencies is called

An athlete completes one round of a circular track of radius R in 40 sec . What will be his displacement at the end of 2 minutes 20seconds?

A boy while playing under a mango tree saw a mango falling in front of him. This is due to the force of:

The density of seawater is 1024 kg/m3. The pressure at a depth of 5 m below the surface of the sea is___ N/m2

How is electroplating used to give to an object a property which originally the metalic object lacks? Give an example. [2 MARKS]

We know that air is a poor conductor of electricity. Then how do the electric discharge take place during lightning? [3 MARKS]

Name the constellation which reminds us of a large ladle or a question mark in the night sky.

Which of the following can be used together to measure the length of a zig-zag path?

When we rub one of the given objects on dry hair and place it close to small pieces of paper, they get attracted. Spot that object. Give reason why only that object attracts and other objects don't attract. (i) Metal pen (ii) Finger of hand (iii) Plastic scale [3 MARKS]

A strong current of water turns the blades of a water turbine, because it possesses :