13232 + Interview Questions in Physics Page 260 InterviewSolution

12951.	Site an example where F and S is there but the work done is still zero.
Answer» Site an example where F and S is there but the work done is still zero.

Discussion

12952.	Why is it dangerous to move out in a moving bus?
Answer» Why is it dangerous to move out in a moving bus?

Discussion

12953.	Which of the following actions would not result in the loss of magnetic property of a magnet?
Answer» Which of the following actions would not result in the loss of magnetic property of a magnet?

Discussion

12954.	For current in a long straight solenoid, North and South poles are created at the two ends. Among the following statements, the incorrect statement is
Answer» For current in a long straight solenoid, North and South poles are created at the two ends. Among the following statements, the incorrect statement is

Discussion

12955.	What is the approximate duration of a njattuvela?
Answer» What is the approximate duration of a njattuvela?

Discussion

12956.	The velocity of a body changes
Answer» The velocity of a body changes

Discussion

12957.	For a displacement-time graph given below, what is the required nature of acceleration-time graph?
Answer» For a displacement-time graph given below, what is the required nature of acceleration-time graph?

Discussion

12958.	A passenger in a moving train tosses a coin. If the coin falls behind him, the train is in
Answer» A passenger in a moving train tosses a coin. If the coin falls behind him, the train is in

Discussion

12959.	Epoch is measured in
Answer» Epoch is measured in

Discussion

12960.	A satellite is orbiting earth at a distance of 42000 km in a circular orbit. It completes one revolution in 24 hours. Calculate its linear speed.
Answer» A satellite is orbiting earth at a distance of 42000 km in a circular orbit. It completes one revolution in 24 hours. Calculate its linear speed.

Discussion

12961.	Earth completes one revolution around the sun in 365 days. Calculate its angular velocity in rads. If the average distance from the sun is 150 million km, find Earth's linear velocity. [3 MARKS]
Answer» Earth completes one revolution around the sun in 365 days. Calculate its angular velocity in $\frac{r a d}{s}$ . If the average distance from the sun is 150 million km, find Earth's linear velocity. [3 MARKS]

Discussion

12962.	A parachute is going upward with a velocity 12m/s. It releases a ball when it is at height of 65 m from the ground. How much time the ball will take to reach the ground?(g = 10m/s2)
Answer» A parachute is going upward with a velocity 12m/s. It releases a ball when it is at height of 65 m from the ground. How much time the ball will take to reach the ground?(g = 10 $m / s^{2}$ )

Discussion

12963.	The magnitude of the charge for a single electron or proton is 1.6×10−19C. What is the net charge of a particle that has 20 electrons and 22 protons?
Answer» The magnitude of the charge for a single electron or proton is $1.6 \times 10^{- 19} C$ . What is the net charge of a particle that has 20 electrons and 22 protons?

Discussion

12964.	A piece of wood has a mass 2 kg and dimensions 1 m×2 m×3 m. Density of the wooden block is .
Answer» A piece of wood has a mass $2 k g$ and dimensions $1 m \times 2 m \times 3 m$ . Density of the wooden block is .

Discussion

12965.	Which of these is at a higher energy level in an alpha decay?
Answer» Which of these is at a higher energy level in an alpha decay?

Discussion

12966.	Describe three ways for the efficient use of energy.
Answer» Describe three ways for the efficient use of energy.

Discussion

12967.	What is meant by an echo ? State two conditions necessary for an echo to be heard distinctly.
Answer» What is meant by an echo ? State two conditions necessary for an echo to be heard distinctly.

Discussion

12968.	Why does water became cold if we put ice cubes into it?
Answer» Why does water became cold if we put ice cubes into it?

Discussion

12969.	Fill in the blank with the correct degree of comparison. I just finished reading a very interesting book, but this one is even ______ than that.
Answer» Fill in the blank with the correct degree of comparison. I just finished reading a very interesting book, but this one is even ______ than that.

12969.

Fill in the blank with the correct degree of comparison. I just finished reading a very interesting book, but this one is even ______ than that.

Answer»

Fill in the blank with the correct degree of comparison.

I just finished reading a very interesting book, but this one is even ______ than that.

Discussion

12970.	Give two illustrations to support law of conservation of momentum
Answer» Give two illustrations to support law of conservation of momentum

Discussion

12971.	derive the formula of kinetic energy and potential energy
Answer» derive the formula of kinetic energy and potential energy

Discussion

12972.	An automobile vehicle has a mass of 1500kg.what must be the force between the vehicle and road if the vehicle is to be stopped with a negative acceleration of 1.7 ms^-2 ?
Answer» An automobile vehicle has a mass of 1500kg.what must be the force between the vehicle and road if the vehicle is to be stopped with a negative acceleration of 1.7 ms^-2 ?

Discussion

12973.	A group of stars that forms a particular shape in the sky and has been given name is called
Answer» A group of stars that forms a particular shape in the sky and has been given name is called

Discussion

12974.	Calculate the force between two masses of 50 kg and 100 kg separated by a distance of 10 m.
Answer» Calculate the force between two masses of $50 k g$ and $100 k g$ separated by a distance of $10 m .$

Discussion

12975.	State and explain the law of inertia (or Newton's first law of motion).
Answer» State and explain the law of inertia (or Newton's first law of motion).

Discussion

12976.	Find the kinetic energy of a body of mass 1 kg moving with a uniform velocity of 10 m s−1.
Answer» Find the kinetic energy of a body of mass 1 kg moving with a uniform velocity of 10 m $s^{- 1}$ .

Discussion

12977.	When a marble rolls down an inclined plane, its velocity__.
Answer» When a marble rolls down an inclined plane, its velocity__.

Discussion

12978.	Consider a particle moving with constant speed such that its acceleration is constant and always perpendicular to its velocity. What can you say about its motion?
Answer» Consider a particle moving with constant speed such that its acceleration is constant and always perpendicular to its velocity. What can you say about its motion?

Discussion

12979.	It is estimated that a signal takes 1.27 seconds to reach the earth from the surface of the moon. Calculate the distance of the moon from the earth. Given speed of radio signal = 3× 108 m/s (speed of light in air).
Answer» It is estimated that a signal takes 1.27 seconds to reach the earth from the surface of the moon. Calculate the distance of the moon from the earth. Given speed of radio signal = 3 $\times$ 10⁸ m/s (speed of light in air).

Discussion

12980.	What is the limitations of solar energy
Answer» What is the limitations of solar energy

Discussion

12981.	A spring balance is graduated on a sea level . If a body is weighed at consecutively increasing heights from the earths surface,the weight indicated by the balance will A)go on increase continously B)go on decreasing continously C) remain the same D)first increase and then decrease
Answer» A spring balance is graduated on a sea level . If a body is weighed at consecutively increasing heights from the earths surface,the weight indicated by the balance will A)go on increase continously B)go on decreasing continously C) remain the same D)first increase and then decrease

12981.

A spring balance is graduated on a sea level . If a body is weighed at consecutively increasing heights from the earths surface,the weight indicated by the balance will A)go on increase continously B)go on decreasing continously C) remain the same D)first increase and then decrease

Answer»

A spring balance is graduated on a sea level . If a body is weighed at consecutively increasing heights from the earths surface,the weight indicated by the balance will

A)go on increase continously

B)go on decreasing continously

C) remain the same

D)first increase and then decrease

Discussion

12982.	What is the effect of force when spring is compressed?
Answer» What is the effect of force when spring is compressed?

Discussion

12983.	Which SI unit prefix is equivalent to 1,000,000?
Answer» Which SI unit prefix is equivalent to 1,000,000?

Discussion

12984.	A boy carries a load of 50 kg on his head and walk on a level road up to 100 m what is the work done by him
Answer» A boy carries a load of 50 kg on his head and walk on a level road up to 100 m what is the work done by him

Discussion

12985.	A body measures 25m . State the unit and the magnitude of unit in the statement
Answer» A body measures 25m . State the unit and the magnitude of unit in the statement

Discussion

12986.	A uniform magnetic field exists in the plane of paper pointing from left to right as shown in Figure. In the field an electron and a proton move as shown. The electron and the proton experience
Answer» A uniform magnetic field exists in the plane of paper pointing from left to right as shown in Figure. In the field an electron and a proton move as shown. The electron and the proton experience

Discussion

12987.	Sound is produced when
Answer» Sound is produced when

Discussion

12988.	(a) Calculate the height of a water column which will exert on its base the same pressure as the 70 cm column of mercury. Density of mercury is 13.6 g cm−3. (b) Will the height of the water column in part (a) change if the cross section of the water column is made wider ?
Answer» (a) Calculate the height of a water column which will exert on its base the same pressure as the 70 cm column of mercury. Density of mercury is 13.6 g $c m^{- 3}$ . (b) Will the height of the water column in part (a) change if the cross section of the water column is made wider ?

12988.

(a) Calculate the height of a water column which will exert on its base the same pressure as the 70 cm column of mercury. Density of mercury is 13.6 g cm−3. (b) Will the height of the water column in part (a) change if the cross section of the water column is made wider ?

Answer»

(a) Calculate the height of a water column which will exert on its base the same pressure as the 70 cm column of mercury. Density of mercury is 13.6 g $c m^{- 3}$ .

(b) Will the height of the water column in part (a) change if the cross section of the water column is made wider ?

Discussion

12989.	From rifle of mass 4kg bullet of mass 50g is fired with an initial velocity of 35m per second.calculate the initial recoil velocity of the rifle.
Answer» From rifle of mass 4kg bullet of mass 50g is fired with an initial velocity of 35m per second.calculate the initial recoil velocity of the rifle.

Discussion

12990.	Sir it is said that"path length of travel is useful in determining" 1)how long a journey might take, 2)wear and tear of a vehicle. Sir can you please explain how ?
Answer» Sir it is said that"path length of travel is useful in determining" 1)how long a journey might take, 2)wear and tear of a vehicle. Sir can you please explain how ?

12990.

Sir it is said that"path length of travel is useful in determining" 1)how long a journey might take, 2)wear and tear of a vehicle. Sir can you please explain how ?

Answer»

Sir it is said that"path length of travel is useful in determining"

1)how long a journey might take,

2)wear and tear of a vehicle.

Sir can you please explain how ?

Discussion

12991.	What name is given to those aircrafts which fly at speeds greater than the speed of sound ?
Answer» What name is given to those aircrafts which fly at speeds greater than the speed of sound ?

Discussion

12992.	When an object falls freely to the ground,its acceleration is constant. Reason?
Answer» When an object falls freely to the ground,its acceleration is constant. Reason?

12992.

When an object falls freely to the ground,its acceleration is constant. Reason?

Answer»

When an object falls freely to the ground,its acceleration is constant.

Reason?

Discussion

12993.	The time period of a pendulum clock is
Answer» The time period of a pendulum clock is

Discussion

12994.	A farmer moves aalong a square field of side 10 m in 40 seconds. What will be the magnitude of displacement of the farmer at the end of 2 minutes 20 seconds from its initial position.
Answer» A farmer moves aalong a square field of side 10 m in 40 seconds. What will be the magnitude of displacement of the farmer at the end of 2 minutes 20 seconds from its initial position.

Discussion

12995.	A force of 10 Newton acts on a body of mass 2kg for 3seconds initially at rest calculate velocity acquired by the body and change in momentum of the body
Answer» A force of 10 Newton acts on a body of mass 2kg for 3seconds initially at rest calculate velocity acquired by the body and change in momentum of the body

Discussion

12996.	A revolver of mass 500g fires a bullet of mass 10g with a speed of 100m/s. Find initial momentum of revolver and bullet as a system.
Answer» A revolver of mass 500g fires a bullet of mass 10g with a speed of 100m/s. Find initial momentum of revolver and bullet as a system.

Discussion

12997.	If dark matter is holding the universe together and dark energy is making the universe expand ,then can we say that dark energy 's force is stronger than that of dark matter because the universe is still expanding?
Answer» If dark matter is holding the universe together and dark energy is making the universe expand ,then can we say that dark energy 's force is stronger than that of dark matter because the universe is still expanding?

Discussion

12998.	Find the area and perimeter of a square whose diagonal is 10cm long
Answer» Find the area and perimeter of a square whose diagonal is 10cm long

Discussion

12999.	Periodic time of a satellite revolving above Earth’s surface at a height equal to R, where R the radius of Earth, is [g is acceleration due to gravity at Earth’s surface]
Answer» Periodic time of a satellite revolving above Earth’s surface at a height equal to R, where R the radius of Earth, is [g is acceleration due to gravity at Earth’s surface]

Discussion

13000.	An object of mass 1 kg has a potential energy of 2 J. What is the height of the object relative to the ground? (Take g=10 ms−2)
Answer» An object of mass $1 k g$ has a potential energy of $2 J$ . What is the height of the object relative to the ground? (Take g $= 10 m s^{- 2}$ )

Discussion

Explore topic-wise InterviewSolutions in .

Site an example where F and S is there but the work done is still zero.

Why is it dangerous to move out in a moving bus?

Which of the following actions would not result in the loss of magnetic property of a magnet?

For current in a long straight solenoid, North and South poles are created at the two ends. Among the following statements, the incorrect statement is

What is the approximate duration of a njattuvela?

The velocity of a body changes

For a displacement-time graph given below, what is the required nature of acceleration-time graph?

A passenger in a moving train tosses a coin. If the coin falls behind him, the train is in

Epoch is measured in

A satellite is orbiting earth at a distance of 42000 km in a circular orbit. It completes one revolution in 24 hours. Calculate its linear speed.

Earth completes one revolution around the sun in 365 days. Calculate its angular velocity in rads. If the average distance from the sun is 150 million km, find Earth's linear velocity. [3 MARKS]

A parachute is going upward with a velocity 12m/s. It releases a ball when it is at height of 65 m from the ground. How much time the ball will take to reach the ground?(g = 10m/s2)

The magnitude of the charge for a single electron or proton is 1.6×10−19C. What is the net charge of a particle that has 20 electrons and 22 protons?

A piece of wood has a mass 2 kg and dimensions 1 m×2 m×3 m. Density of the wooden block is .

Which of these is at a higher energy level in an alpha decay?

Describe three ways for the efficient use of energy.

What is meant by an echo ? State two conditions necessary for an echo to be heard distinctly.

Why does water became cold if we put ice cubes into it?

Fill in the blank with the correct degree of comparison. I just finished reading a very interesting book, but this one is even ______ than that.

Give two illustrations to support law of conservation of momentum

derive the formula of kinetic energy and potential energy

An automobile vehicle has a mass of 1500kg.what must be the force between the vehicle and road if the vehicle is to be stopped with a negative acceleration of 1.7 ms^-2 ?

A group of stars that forms a particular shape in the sky and has been given name is called

Calculate the force between two masses of 50 kg and 100 kg separated by a distance of 10 m.

State and explain the law of inertia (or Newton's first law of motion).

Find the kinetic energy of a body of mass 1 kg moving with a uniform velocity of 10 m s−1.

When a marble rolls down an inclined plane, its velocity__.

Consider a particle moving with constant speed such that its acceleration is constant and always perpendicular to its velocity. What can you say about its motion?

It is estimated that a signal takes 1.27 seconds to reach the earth from the surface of the moon. Calculate the distance of the moon from the earth. Given speed of radio signal = 3× 108 m/s (speed of light in air).

What is the limitations of solar energy

A spring balance is graduated on a sea level . If a body is weighed at consecutively increasing heights from the earths surface,the weight indicated by the balance will A)go on increase continously B)go on decreasing continously C) remain the same D)first increase and then decrease

What is the effect of force when spring is compressed?

Which SI unit prefix is equivalent to 1,000,000?

A boy carries a load of 50 kg on his head and walk on a level road up to 100 m what is the work done by him

A body measures 25m . State the unit and the magnitude of unit in the statement

A uniform magnetic field exists in the plane of paper pointing from left to right as shown in Figure. In the field an electron and a proton move as shown. The electron and the proton experience

Sound is produced when

(a) Calculate the height of a water column which will exert on its base the same pressure as the 70 cm column of mercury. Density of mercury is 13.6 g cm−3. (b) Will the height of the water column in part (a) change if the cross section of the water column is made wider ?

From rifle of mass 4kg bullet of mass 50g is fired with an initial velocity of 35m per second.calculate the initial recoil velocity of the rifle.

Sir it is said that"path length of travel is useful in determining" 1)how long a journey might take, 2)wear and tear of a vehicle. Sir can you please explain how ?

What name is given to those aircrafts which fly at speeds greater than the speed of sound ?

When an object falls freely to the ground,its acceleration is constant. Reason?

The time period of a pendulum clock is

A farmer moves aalong a square field of side 10 m in 40 seconds. What will be the magnitude of displacement of the farmer at the end of 2 minutes 20 seconds from its initial position.

A force of 10 Newton acts on a body of mass 2kg for 3seconds initially at rest calculate velocity acquired by the body and change in momentum of the body

A revolver of mass 500g fires a bullet of mass 10g with a speed of 100m/s. Find initial momentum of revolver and bullet as a system.

If dark matter is holding the universe together and dark energy is making the universe expand ,then can we say that dark energy 's force is stronger than that of dark matter because the universe is still expanding?

Find the area and perimeter of a square whose diagonal is 10cm long

Periodic time of a satellite revolving above Earth’s surface at a height equal to R, where R the radius of Earth, is [g is acceleration due to gravity at Earth’s surface]

An object of mass 1 kg has a potential energy of 2 J. What is the height of the object relative to the ground? (Take g=10 ms−2)