9478 + Interview Questions in Physics Page 158 InterviewSolution

7851.	When we rub our hands together, frictional force gives rise to:
Answer» When we rub our hands together, frictional force gives rise to:

Discussion

7852.	From a rifle of mass 4 kg, a bullet of mass 50 g is fired with a velocity of 35 ms−1 with respect to the ground. Calculate the recoil velocity of the rifle.
Answer» From a rifle of mass $4 k g$ , a bullet of mass $50 g$ is fired with a velocity of $35 {m s}^{- 1}$ with respect to the ground. Calculate the recoil velocity of the rifle.

Discussion

7853.	The head scale of a screw gauge has 100 divisions and the screw moves 4 mm ahead in four rotations of the circular head. The pitch and the least count are respectively
Answer» The head scale of a screw gauge has 100 divisions and the screw moves 4 mm ahead in four rotations of the circular head. The pitch and the least count are respectively

Discussion

7854.	What is the meaning of liquid pressure
Answer» What is the meaning of liquid pressure

Discussion

7855.	An ebonite rod is rubbed with fur.Compare the charges acquired by them.
Answer» An ebonite rod is rubbed with fur.Compare the charges acquired by them.

Discussion

7856.	A lightning strike is so strong that it can destroy life and property. Select the safe measure(s) to be taken to protect ourselves.
Answer» A lightning strike is so strong that it can destroy life and property. Select the safe measure(s) to be taken to protect ourselves.

Discussion

7857.	23:25:00 in 12−hour format will be written as:
Answer» $23 : 25 : 00$ in $12 -$ hour format will be written as:

Discussion

7858.	During melting, intermolecular force will ______.
Answer» During melting, intermolecular force will ______.

Discussion

7859.	On the Celsius scale, the absolute zero temperature is at ___.
Answer» On the Celsius scale, the absolute zero temperature is at ___.

7859.

On the Celsius scale, the absolute zero temperature is at ___.

Answer»

On the Celsius scale, the absolute zero temperature is at ___.

Discussion

7860.	1)define friction 2)what is interlocking 3)explain lubricants 4)define rolling friction,sliding friction,static friction in3 lines
Answer» 1)define friction 2)what is interlocking 3)explain lubricants 4)define rolling friction,sliding friction,static friction in3 lines

7860.

1)define friction 2)what is interlocking 3)explain lubricants 4)define rolling friction,sliding friction,static friction in3 lines

Answer»

1)define friction

2)what is interlocking

3)explain lubricants

4)define rolling friction,sliding friction,static friction

in3 lines

Discussion

7861.	Current is measured by a fundamental unit. What is that?
Answer» Current is measured by a fundamental unit. What is that?

Discussion

7862.	Whaen sound wavestravelling in air enter ainto the water the quatity which remains unchanged A . wavelenght B. velocity C . frequency D. None of these Explain.
Answer» Whaen sound wavestravelling in air enter ainto the water the quatity which remains unchanged A . wavelenght B. velocity C . frequency D. None of these Explain.

Discussion

7863.	What makes water evaporate in vacuum....pls explain at molecular level and also how pressure affects change of state of matter....pls explain at molecular level
Answer» What makes water evaporate in vacuum....pls explain at molecular level and also how pressure affects change of state of matter....pls explain at molecular level

Discussion

7864.	Describe the effect of force acting upon an object when a mechanical pull on a bike is greater than the frictional force.
Answer» Describe the effect of force acting upon an object when a mechanical pull on a bike is greater than the frictional force.

Discussion

7865.	Why do like poles repel of magnets?
Answer» Why do like poles repel of magnets?

Discussion

7866.	I Want to know about persistence of hearing.. please reply soon..
Answer» I Want to know about persistence of hearing.. please reply soon..

Discussion

7867.	Why is cooling produced on evaporation of liquid?
Answer» Why is cooling produced on evaporation of liquid?

Discussion

7868.	How does pitch of sound depend on type of material vibrating?
Answer» How does pitch of sound depend on type of material vibrating?

Discussion

7869.	Define the angle of incidence.
Answer» Define the angle of incidence.

Discussion

7870.	State one way to obtain greater moment of a given force about a given axis of rotation
Answer» State one way to obtain greater moment of a given force about a given axis of rotation

Discussion

7871.	A child is standing in front of a magic mirror. She finds the image of her head bigger, the middle portion of her body of the same size and that of the legs smaller. The following is the order of combinations for the magic mirror from top.
Answer» A child is standing in front of a magic mirror. She finds the image of her head bigger, the middle portion of her body of the same size and that of the legs smaller. The following is the order of combinations for the magic mirror from top.

Discussion

7872.	The temperature at which a liquid converts into a solid is called:
Answer» The temperature at which a liquid converts into a solid is called:

Discussion

7873.	Arrange the following substances in order of their increasing density: Iron, Cork, Brass, Water, Mercury.
Answer» Arrange the following substances in order of their increasing density: Iron, Cork, Brass, Water, Mercury.

7873.

Arrange the following substances in order of their increasing density: Iron, Cork, Brass, Water, Mercury.

Answer»

Arrange the following substances in order of their increasing density:

Iron, Cork, Brass, Water, Mercury.

Discussion

7874.	A moment of 200 Nm required to open the door. Determine the distance of the point of force from the hinged point if a 50 N force perpendicular to the radius can just open the door.
Answer» A moment of $200 N m$ required to open the door. Determine the distance of the point of force from the hinged point if a $50 N$ force perpendicular to the radius can just open the door.

Discussion

7875.	Define refraction of light.
Answer» Define refraction of light.

Discussion

7876.	Name one chemical compound which is produced by using the chemical effect of electric current.
Answer» Name one chemical compound which is produced by using the chemical effect of electric current.

Discussion

7877.	A block is sliding down an inclined plane. The velocity changes at a constant rate from 10 cm/s to 15 cm/s in 2 s. What is its acceleration?
Answer» A block is sliding down an inclined plane. The velocity changes at a constant rate from $10 c m / s$ to $15 c m / s$ in $2 s$ . What is its acceleration?

Discussion

7878.	What do you mean by atmospheric pressure?
Answer» What do you mean by atmospheric pressure?

Discussion

7879.	A note of 500 Hz travels through a solid. If the velocity of sound in the solid is 3500 m/s, the wavelength is
Answer» A note of 500 Hz travels through a solid. If the velocity of sound in the solid is 3500 m/s, the wavelength is

Discussion

7880.	Can division of two irrational number be rational?
Answer» Can division of two irrational number be rational?

Discussion

7881.	The velocity of light in glass whose refractive index with respect to air is 1.5 is 2×108 ms−1and in certain liquid, the velocity of light is found to be 2.50×108 ms−1. Find the refractive index of that liquid with respect to air.
Answer» The velocity of light in glass whose refractive index with respect to air is $1.5$ is $2 \times 10^{8} m s^{- 1}$ and in certain liquid, the velocity of light is found to be $2.50 \times 10^{8} m s^{- 1}$ . Find the refractive index of that liquid with respect to air.

Discussion

7882.	What is the relation between thrust and pressure ?
Answer» What is the relation between thrust and pressure ?

Discussion

7883.	Man A has a defect of vision due to which he cannot see the nearby objects clearly (through he can see the distant objects clearly). On the other hand, man B has a defect of vision due to which he cannot see the distant objects clearly (though he can see the nearby objects clearly). The defect in man A can be corrected by using spectacles containing lenses C whereas the defect in man B can be corrected by using spectacles containing lenses D. (a) Name the defect of vision in man (i) A and (ii) B. (b) What type of lenses are (i) C and (ii) D?
Answer» Man A has a defect of vision due to which he cannot see the nearby objects clearly (through he can see the distant objects clearly). On the other hand, man B has a defect of vision due to which he cannot see the distant objects clearly (though he can see the nearby objects clearly). The defect in man A can be corrected by using spectacles containing lenses C whereas the defect in man B can be corrected by using spectacles containing lenses D. (a) Name the defect of vision in man (i) A and (ii) B. (b) What type of lenses are (i) C and (ii) D?

Discussion

7884.	A toy duck of volume of 15 cm3 and mass of 25 g is thrown into a liquid. For the duck to sink in the liquid, the density of the liquid should be _______.
Answer» A toy duck of volume of $15 c m^{3}$ and mass of $25 g$ is thrown into a liquid. For the duck to sink in the liquid, the density of the liquid should be _______.

Discussion

7885.	What is far point ?
Answer» What is far point ?

Discussion

7886.	Which amongst the following is the major constituent of biogas?
Answer» Which amongst the following is the major constituent of biogas?

Discussion

7887.	Draw a ray diagram to show the formation of image of an object placed beyond the centre of curvature of a concave mirror. State the position, size and nature of the image.
Answer» Draw a ray diagram to show the formation of image of an object placed beyond the centre of curvature of a concave mirror. State the position, size and nature of the image.

Discussion

7888.	Question 01 Which of the following cannot be charged easily by friction? (a) A plastic scale (b) A copper rod (c) An inflated balloon (d) A woollen cloth.
Answer» Question 01 Which of the following cannot be charged easily by friction? (a) A plastic scale (b) A copper rod (c) An inflated balloon (d) A woollen cloth.

Discussion

7889.	Energy supplied to run a machine is wasted in
Answer» Energy supplied to run a machine is wasted in

Discussion

7890.	Explain that How can we find thr pole star with the help of Ursa major.?
Answer» Explain that How can we find thr pole star with the help of Ursa major.?

Discussion

7891.	What is the relationship between melting point and freezing point of a body?
Answer» What is the relationship between melting point and freezing point of a body?

Discussion

7892.	The density of brass is 8.4 g cm−3. What do you mean by this statement?
Answer» The density of brass is 8.4 g $c m^{-} 3$ . What do you mean by this statement?

Discussion

7893.	Which among the following undergoes sublimation?
Answer» Which among the following undergoes sublimation?

Discussion

7894.	What is static electricity? Explain why a charged body loses its charge if we touch it with our hand. [3 MARKS]
Answer» What is static electricity? Explain why a charged body loses its charge if we touch it with our hand. [3 MARKS]

Discussion

7895.	When a shot-put champion releases a 5.0 kg shot, it is at 1.5m above the ground and traveling at 10 ms. It reaches a maximum height of 5m above the ground. What are the total mechanical energy, kinetic energy, and potential energy of the shot at its maximum height?
Answer» When a shot-put champion releases a 5.0 kg shot, it is at 1.5m above the ground and traveling at 10 $\frac{m}{s}$ . It reaches a maximum height of 5m above the ground. What are the total mechanical energy, kinetic energy, and potential energy of the shot at its maximum height?

Discussion

7896.	Ramu moves along the periphery of a square field of side 10 m. He completes travelling one side in 40 s. What will be the magnitude of distance and displacement at the end of 2 minutes and 20 seconds ?
Answer» Ramu moves along the periphery of a square field of side $10 m$ . He completes travelling one side in $40 s$ . What will be the magnitude of distance and displacement at the end of $2$ minutes and $20$ seconds ?

Discussion

7897.	Describe how sound is produced by the human voice box (or larynx).
Answer» Describe how sound is produced by the human voice box (or larynx).

Discussion

7898.	Name one example from everyday life where wheels (or rollers) are used to reduce friction.
Answer» Name one example from everyday life where wheels (or rollers) are used to reduce friction.

Discussion

7899.	Name any two common musical instruments and identify their vibrating parts.
Answer» Name any two common musical instruments and identify their vibrating parts.

Discussion

7900.	Name the force which always opposes motion.
Answer» Name the force which always opposes motion.

Discussion

Explore topic-wise InterviewSolutions in .

When we rub our hands together, frictional force gives rise to:

From a rifle of mass 4 kg, a bullet of mass 50 g is fired with a velocity of 35 ms−1​ with respect to the ground. Calculate the recoil velocity of the rifle.

The head scale of a screw gauge has 100 divisions and the screw moves 4 mm ahead in four rotations of the circular head. The pitch and the least count are respectively

What is the meaning of liquid pressure

An ebonite rod is rubbed with fur.Compare the charges acquired by them.

A lightning strike is so strong that it can destroy life and property. Select the safe measure(s) to be taken to protect ourselves.

23:25:00 in 12−hour format will be written as:

During melting, intermolecular force will ______.

On the Celsius scale, the absolute zero temperature is at ___.

1)define friction 2)what is interlocking 3)explain lubricants 4)define rolling friction,sliding friction,static friction in3 lines

Current is measured by a fundamental unit. What is that?

Whaen sound wavestravelling in air enter ainto the water the quatity which remains unchanged A . wavelenght B. velocity ​​​​​​ C . frequency D. None of these Explain. ​​​​​

What makes water evaporate in vacuum....pls explain at molecular level and also how pressure affects change of state of matter....pls explain at molecular level

Describe the effect of force acting upon an object when a mechanical pull on a bike is greater than the frictional force.

Why do like poles repel of magnets?

I Want to know about persistence of hearing.. please reply soon..

Why is cooling produced on evaporation of liquid?

How does pitch of sound depend on type of material vibrating?

Define the angle of incidence.

State one way to obtain greater moment of a given force about a given axis of rotation

A child is standing in front of a magic mirror. She finds the image of her head bigger, the middle portion of her body of the same size and that of the legs smaller. The following is the order of combinations for the magic mirror from top.

The temperature at which a liquid converts into a solid is called:

Arrange the following substances in order of their increasing density: Iron, Cork, Brass, Water, Mercury.

A moment of 200 Nm required to open the door. Determine the distance of the point of force from the hinged point if a 50 N force perpendicular to the radius can just open the door.

Define refraction of light.

Name one chemical compound which is produced by using the chemical effect of electric current.

A block is sliding down an inclined plane. The velocity changes at a constant rate from 10 cm/s to 15 cm/s in 2 s. What is its acceleration?

What do you mean by atmospheric pressure?

A note of 500 Hz travels through a solid. If the velocity of sound in the solid is 3500 m/s, the wavelength is

Can division of two irrational number be rational?

The velocity of light in glass whose refractive index with respect to air is 1.5 is 2×108 ms−1and in certain liquid, the velocity of light is found to be 2.50×108 ms−1. Find the refractive index of that liquid with respect to air.

What is the relation between thrust and pressure ?

A toy duck of volume of 15 cm3 and mass of 25 g is thrown into a liquid. For the duck to sink in the liquid, the density of the liquid should be _______.

What is far point ?

Which amongst the following is the major constituent of biogas?

Draw a ray diagram to show the formation of image of an object placed beyond the centre of curvature of a concave mirror. State the position, size and nature of the image.

Question 01 Which of the following cannot be charged easily by friction? (a) A plastic scale (b) A copper rod (c) An inflated balloon (d) A woollen cloth.

Energy supplied to run a machine is wasted in

Explain that How can we find thr pole star with the help of Ursa major.?

What is the relationship between melting point and freezing point of a body?

The density of brass is 8.4 g cm−3. What do you mean by this statement?

Which among the following undergoes sublimation?

What is static electricity? Explain why a charged body loses its charge if we touch it with our hand. [3 MARKS]

When a shot-put champion releases a 5.0 kg shot, it is at 1.5m above the ground and traveling at 10 ms. It reaches a maximum height of 5m above the ground. What are the total mechanical energy, kinetic energy, and potential energy of the shot at its maximum height?

Ramu moves along the periphery of a square field of side 10 m. He completes travelling one side in 40 s. What will be the magnitude of distance and displacement at the end of 2 minutes and 20 seconds ?

Describe how sound is produced by the human voice box (or larynx).

Name one example from everyday life where wheels (or rollers) are used to reduce friction.

Name any two common musical instruments and identify their vibrating parts.

Name the force which always opposes motion.

From a rifle of mass 4 kg, a bullet of mass 50 g is fired with a velocity of 35 ms−1 with respect to the ground. Calculate the recoil velocity of the rifle.

Whaen sound wavestravelling in air enter ainto the water the quatity which remains unchanged A . wavelenght B. velocity C . frequency D. None of these Explain.