9478 + Interview Questions in Physics Page 151 InterviewSolution

7501.	Why sky looks blue to us?
Answer» Why sky looks blue to us?

Discussion

7502.	From the diagram below, find the angle of incidence.
Answer» From the diagram below, find the angle of incidence.

7502.

From the diagram below, find the angle of incidence.

Answer»

From the diagram below, find the angle of incidence.

Discussion

7503.	what is the vibrating part in jaltarng
Answer» what is the vibrating part in jaltarng

Discussion

7504.	Which of the following is a lubricant?
Answer» Which of the following is a lubricant?

Discussion

7505.	What can we do if we become a victim of lightning spark ?
Answer» What can we do if we become a victim of lightning spark ?

Discussion

7506.	One of the following is not used for electroplating metal articles. This one is : (a) nickel (b) chromium (c) sodium (d) silver
Answer» One of the following is not used for electroplating metal articles. This one is : (a) nickel (b) chromium (c) sodium (d) silver

Discussion

7507.	About HYPERMETROPIA.
Answer» About HYPERMETROPIA.

Discussion

7508.	Why is Venus the hottest planet?
Answer» Why is Venus the hottest planet?

Discussion

7509.	When charges do not flow, the electricity is called
Answer» When charges do not flow, the electricity is called

Discussion

7510.	Name the planet having a well - developed system of rings around it.
Answer» Name the planet having a well - developed system of rings around it.

Discussion

7511.	Why is it dangerous to touch electrical appliances with wet hands?
Answer» Why is it dangerous to touch electrical appliances with wet hands?

Discussion

7512.	(a) In which direction do stars appear to move in the sky? (b) Why do they appear to move in this direction?
Answer» (a) In which direction do stars appear to move in the sky? (b) Why do they appear to move in this direction?

7512.

(a) In which direction do stars appear to move in the sky? (b) Why do they appear to move in this direction?

Answer»

(a) In which direction do stars appear to move in the sky?

(b) Why do they appear to move in this direction?

Discussion

7513.	Fill in the blanks : (a) The time period of a wave is 2 s. Its frequency is ___. (b) The pitch of a stringed instrument is increases by ___ tension in string. (c) The pitch of a flute is decreased by ___ length of air column. (d) Smaller the emebrene, ___ is the pitch. (e) If a drum is beaten hard, its loudness ___ . (f) A tuning fork produces sound of ___ frequency.
Answer» Fill in the blanks : (a) The time period of a wave is 2 s. Its frequency is ___. (b) The pitch of a stringed instrument is increases by ___ tension in string. (c) The pitch of a flute is decreased by ___ length of air column. (d) Smaller the emebrene, ___ is the pitch. (e) If a drum is beaten hard, its loudness ___ . (f) A tuning fork produces sound of ___ frequency.

7513.

Fill in the blanks : (a) The time period of a wave is 2 s. Its frequency is _. (b) The pitch of a stringed instrument is increases by _ tension in string. (c) The pitch of a flute is decreased by _ length of air column. (d) Smaller the emebrene, _ is the pitch. (e) If a drum is beaten hard, its loudness _ . (f) A tuning fork produces sound of _ frequency.

Answer»

Fill in the blanks :

(a) The time period of a wave is 2 s. Its frequency is ___.

(b) The pitch of a stringed instrument is increases by ___ tension in string.

(c) The pitch of a flute is decreased by ___ length of air column.

(d) Smaller the emebrene, ___ is the pitch.

(e) If a drum is beaten hard, its loudness ___ .

(f) A tuning fork produces sound of ___ frequency.

Discussion

7514.	Which has greater rolling friction - a steel train wheel or an automobile tyre?
Answer» Which has greater rolling friction - a steel train wheel or an automobile tyre?

Discussion

7515.	Name the S.I unit of density. How is it related to g cm−3?
Answer» Name the S.I unit of density. How is it related to g $c m - 3$ ?

Discussion

7516.	What would be the impact on friction if powder is sprinkled on the ?
Answer» What would be the impact on friction if powder is sprinkled on the ?

Discussion

7517.	John covers a part of the journey at 20 km/hr and the remaining at 70 km/hr , taking 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 total of 8 hours to cover the distance of 400 km. How many hours he has been driving at 20 $k m / h r$ ?

Discussion

7518.	To get three images of a single object one should have two plane mirrors at
Answer» To get three images of a single object one should have two plane mirrors at

Discussion

7519.	How the sound of burstin of a balloon is related to the sound of thunder?
Answer» How the sound of burstin of a balloon is related to the sound of thunder?

Discussion

7520.	The net force acting on a body moving with a constant velocity of 5 m/s is:
Answer» The net force acting on a body moving with a constant velocity of 5 m/s is:

Discussion

7521.	How was the earth formed?
Answer» How was the earth formed?

Discussion

7522.	How does a bicycle stop when its brakes are applied ?
Answer» How does a bicycle stop when its brakes are applied ?

Discussion

7523.	A glass rod is rubbed with a silk cloth and an inflated rubber balloon is rubbed with a woollen cloth. Now, out of glass rod, silk cloth, rubber balloon and woollen cloth: (a) Which two objects acquire negative charge? (b) Which two objects acquire positive charge?
Answer» A glass rod is rubbed with a silk cloth and an inflated rubber balloon is rubbed with a woollen cloth. Now, out of glass rod, silk cloth, rubber balloon and woollen cloth: (a) Which two objects acquire negative charge? (b) Which two objects acquire positive charge?

7523.

A glass rod is rubbed with a silk cloth and an inflated rubber balloon is rubbed with a woollen cloth. Now, out of glass rod, silk cloth, rubber balloon and woollen cloth: (a) Which two objects acquire negative charge? (b) Which two objects acquire positive charge?

Answer»

A glass rod is rubbed with a silk cloth and an inflated rubber balloon is rubbed with a woollen cloth.

Now, out of glass rod, silk cloth, rubber balloon and woollen cloth:

(a) Which two objects acquire negative charge?

(b) Which two objects acquire positive charge?

Discussion

7524.	Explain why, wooden (or concrete) sleepers are kept below the railway line.
Answer» Explain why, wooden (or concrete) sleepers are kept below the railway line.

Discussion

7525.	A 20 kg body is moving with a velocity of 7.5 ms−1. What is the force required to make it come to rest in three seconds.
Answer» A $20 k g$ body is moving with a velocity of $7.5 m s^{- 1}$ . What is the force required to make it come to rest in three seconds.

Discussion

7526.	Milk has a density of 1.03 g ml−1 at 25∘C. Calculate the mass of 1 litre of milk at 25∘C.
Answer» Milk has a density of $1.03 g m l^{- 1}$ at $25^{\circ} C$ . Calculate the mass of 1 litre of milk at $25^{\circ} C$ .

Discussion

7527.	Define static friction.
Answer» Define static friction.

Discussion

7528.	What is the magnitude of force needed to produce an acceleration of 4 ms−2 in a ball of 6 kg?
Answer» What is the magnitude of force needed to produce an acceleration of $4 {m s}^{- 2}$ in a ball of $6 k g$ ?

Discussion

7529.	Which of the following actions is being applied by Spiderman while hanging upside down?
Answer» Which of the following actions is being applied by Spiderman while hanging upside down?

7529.

Which of the following actions is being applied by Spiderman while hanging upside down?

Answer»

Which of the following actions is being applied by Spiderman while hanging upside down?

Discussion

7530.	What is kinetic friction
Answer» What is kinetic friction

Discussion

7531.	The area of the rectangle with length 11 cm and width equal to half its length will be
Answer» The area of the rectangle with length 11 cm and width equal to half its length will be

Discussion

7532.	An object weighs 36g in the air and has a volume of 8.0 cm3. What will be it's apparent weight when immersed fully in water? Density of water = 1kg/ m3.
Answer» An object weighs 36g in the air and has a volume of 8.0 cm³. What will be it's apparent weight when immersed fully in water? Density of water = 1kg/ m³.

Discussion

7533.	In which type of charging does an object accuire an opposite charge
Answer» In which type of charging does an object accuire an opposite charge

Discussion

7534.	If an object around us was to reflect light in a regular way what problems might we face Could you please check my answer Ans: if all objects were to reflect light through regular reflection then all objects would act as a mirror and we could find a image in almost all objects
Answer» If an object around us was to reflect light in a regular way what problems might we face Could you please check my answer Ans: if all objects were to reflect light through regular reflection then all objects would act as a mirror and we could find a image in almost all objects

7534.

If an object around us was to reflect light in a regular way what problems might we face Could you please check my answer Ans: if all objects were to reflect light through regular reflection then all objects would act as a mirror and we could find a image in almost all objects

Answer»

If an object around us was to reflect light in a regular way what problems might we face

Could you please check my answer

Ans: if all objects were to reflect light through regular reflection then all objects would act as a mirror and we could find a image in almost all objects

Discussion

7535.	The SI unit of force is:
Answer» The SI unit of force is:

Discussion

7536.	Rahul has set up a new shop where he sells food packaged in iron containers. However, he is receiving a lot of complaints about his food being spoilt. Rahul lets his friend Rohit in about this problem. Rohit recommends Rahul to use tin-coated iron containers instead. What could be the reason for this?
Answer» Rahul has set up a new shop where he sells food packaged in iron containers. However, he is receiving a lot of complaints about his food being spoilt. Rahul lets his friend Rohit in about this problem. Rohit recommends Rahul to use tin-coated iron containers instead. What could be the reason for this?

Discussion

7537.	Why did we remain on ground why don't we sink into it?
Answer» Why did we remain on ground why don't we sink into it?

Discussion

7538.	Greater _____ is related to greater loudness.
Answer» Greater _____ is related to greater loudness.

Discussion

7539.	What happens when a ray of light is incident on a plane mirror at an angle of 30∘.
Answer» What happens when a ray of light is incident on a plane mirror at an angle of $30^{\circ}$ .

Discussion

7540.	If a force is applied on an object in the direction of its motion, then what happens to the speed of the object?
Answer» If a force is applied on an object in the direction of its motion, then what happens to the speed of the object?

Discussion

7541.	For a quadrilateral ABCD to be a parallelogram,__________
Answer» For a quadrilateral ABCD to be a parallelogram,__________

Discussion

7542.	State three properties of molecules of a matter.
Answer» State three properties of molecules of a matter.

Discussion

7543.	The audible range of sound in humans is :
Answer» The audible range of sound in humans is :

7543.

The audible range of sound in humans is :

Answer»

The audible range of sound in humans is :

Discussion

7544.	Name three constituents of an atom and state the kind of charge on each of them.
Answer» Name three constituents of an atom and state the kind of charge on each of them.

Discussion

7545.	Explain Frequency with its unit. [2 MARKS]
Answer» Explain Frequency with its unit. [2 MARKS]

Discussion

7546.	The incident ray and the reflected ray from a mirror are mutually perpendicular to each other. The angle of incidence is :
Answer» The incident ray and the reflected ray from a mirror are mutually perpendicular to each other. The angle of incidence is :

Discussion

7547.	___ device is used to protect buildings from lightning.
Answer» ___ device is used to protect buildings from lightning.

Discussion

7548.	It is easier to walk on soft sand by wearing
Answer» It is easier to walk on soft sand by wearing

Discussion

7549.	If two people are applying 10 N and 20 N force respectively on an object on opposite directions, what is the net force? Is it 10 N or -10 N ?
Answer» If two people are applying 10 N and 20 N force respectively on an object on opposite directions, what is the net force? Is it 10 N or -10 N ?

Discussion

7550.	Which of the following pictures represents the arrangement of particles in a gas?
Answer» Which of the following pictures represents the arrangement of particles in a gas?

7550.

Which of the following pictures represents the arrangement of particles in a gas?

Answer»

Which of the following pictures represents the arrangement of particles in a gas?

Discussion

Explore topic-wise InterviewSolutions in .

Why sky looks blue to us?

From the diagram below, find the angle of incidence.

what is the vibrating part in jaltarng

Which of the following is a lubricant?

What can we do if we become a victim of lightning spark ?

One of the following is not used for electroplating metal articles. This one is : (a) nickel (b) chromium (c) sodium (d) silver

About HYPERMETROPIA.

Why is Venus the hottest planet?

When charges do not flow, the electricity is called

Name the planet having a well - developed system of rings around it.

Why is it dangerous to touch electrical appliances with wet hands?

(a) In which direction do stars appear to move in the sky? (b) Why do they appear to move in this direction?

Which has greater rolling friction - a steel train wheel or an automobile tyre?

Name the S.I unit of density. How is it related to g cm−3?

What would be the impact on friction if powder is sprinkled on the ?

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

To get three images of a single object one should have two plane mirrors at

How the sound of burstin of a balloon is related to the sound of thunder?

The net force acting on a body moving with a constant velocity of 5 m/s is:

How was the earth formed?

How does a bicycle stop when its brakes are applied ?

A glass rod is rubbed with a silk cloth and an inflated rubber balloon is rubbed with a woollen cloth. Now, out of glass rod, silk cloth, rubber balloon and woollen cloth: (a) Which two objects acquire negative charge? (b) Which two objects acquire positive charge?

Explain why, wooden (or concrete) sleepers are kept below the railway line.

A 20 kg body is moving with a velocity of 7.5 ms−1. What is the force required to make it come to rest in three seconds.

Milk has a density of 1.03 g ml−1 at 25∘C. Calculate the mass of 1 litre of milk at 25∘C.

Define static friction.

What is the magnitude of force needed to produce an acceleration of 4 ms−2​ in a ball of 6 kg?

Which of the following actions is being applied by Spiderman while hanging upside down?

What is kinetic friction

The area of the rectangle with length 11 cm and width equal to half its length will be

An object weighs 36g in the air and has a volume of 8.0 cm​​​​​3. What will be it's apparent weight when immersed fully in water? Density of water = 1kg/ m​​​​​​3.

In which type of charging does an object accuire an opposite charge

If an object around us was to reflect light in a regular way what problems might we face Could you please check my answer Ans: if all objects were to reflect light through regular reflection then all objects would act as a mirror and we could find a image in almost all objects

The SI unit of force is:

Why did we remain on ground why don't we sink into it?

Greater _____ is related to greater loudness.

What happens when a ray of light is incident on a plane mirror at an angle of 30∘.

If a force is applied on an object in the direction of its motion, then what happens to the speed of the object?

For a quadrilateral ABCD to be a parallelogram,__________

State three properties of molecules of a matter.

The audible range of sound in humans is :

Name three constituents of an atom and state the kind of charge on each of them.

Explain Frequency with its unit. [2 MARKS]

The incident ray and the reflected ray from a mirror are mutually perpendicular to each other. The angle of incidence is :

___ device is used to protect buildings from lightning.

It is easier to walk on soft sand by wearing

If two people are applying 10 N and 20 N force respectively on an object on opposite directions, what is the net force? Is it 10 N or -10 N ?

Which of the following pictures represents the arrangement of particles in a gas?

What is the magnitude of force needed to produce an acceleration of 4 ms−2 in a ball of 6 kg?

An object weighs 36g in the air and has a volume of 8.0 cm3. What will be it's apparent weight when immersed fully in water? Density of water = 1kg/ m3.