ICS Part 1 Physics English Medium Chapter 5 Online Short Questions Test with Answers

Online Short Questions For Chapter 5 "ICS Part 1 Physics Chapter 5 Short Questions Test "

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Physics - ICS Part 1 Physics Chapter 5 Short Questions Test

Question # 1

What is meant by moment of inertia? Explain its significance.

Ans 1: The product of mass of the particle and square of its perpendicular distance from the axis of rotation is called the moment of inertia.

I =mr²
^{The moment of inertia plays the same role in angular motion as the mass in linear motion.}

Question # 2

What are Artificial Satellites and how they move around the earth?

Ans 1: Satellites are the objects that orbit around the earth.They are put into orbit by rockets and are held in orbits by the gravitational pull of the earth.

Question # 3

Define Moment of Inertia.Write its formula.

Ans 1: The property of the body to resist any change in its state of rest or uniform angular velocity is called moment of inertia. For a point mass 'm'situated at a distance 'r' from the axis of rotation , the moment of inertia 'I' is given by ; I=mr²
Significance;
Moment of inertia plays the same role in angular motion as that of mass plays in linear motion. It is also called measure of rotational inertia in angular motion.Moment of inertia determines the angular acceleration while mass determines the linear acceleration.

Question # 4

Why you wear seat belts?

Ans 1: During collision, the passengers move forward towards the windscreen due to inertia. The seat belt prevents the passenger from moving forward. And lessened the chances of injury.

Question # 5

Define angular momentum and give its dimension.

Ans 1:

Question # 6

State the law of conversation of angular momentum.

Ans 1:

Question # 7

Write down application of communication satellites.

Ans 1: A satellite communication system consist of three geo-stationary satellites.There are over 200 Earth stations which can transmit and receive signals.INTELSAT-VI operates at microwave frequencies 4, 4, 11 and 14 Ghz and has a capacity of 30,000 two way telephone circuits plus three TV channels.
Geo-stationary satellite are very useful for worldwide communication,weather observation, navigation, and other military uses.

Question # 8

Define centripetal force; write its formula and unit.

Ans 1:

Question # 9

When mud files off the tyre of a moving bicycle, I what direction does it fly?

Ans 1: Adhesive force between mud and tire is weal. When the mud files off the tyre of a moving bicycle, it always files along the tangent to the tyre. Because linear velocity is always tangent to the circle.

Question # 10

What are geostationary orbit and geostationary satellites?

Ans 1: Geostationary Orbit: An orbit in which the time period of satellite is equal to the time period of spin motion of the earth is called geostationary orbit.

Geostationary Satellites: A satellite whose orbital motion is stationary along the earth is called geostationary satellite.

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Prepare Complete Set Wise Questions For Chapter 5 "ICS Part 1 Physics Chapter 5 Short Questions Test "

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ICS Part 1 Physics Chapter 5 Short Questions Test - Set 1

Question # 1

What is meant by moment of inertia? Explain its significance.

Ans 1: The product of mass of the particle and square of its perpendicular distance from the axis of rotation is called the moment of inertia.

I =mr²
^{The moment of inertia plays the same role in angular motion as the mass in linear motion.}

Question # 2

What are Artificial Satellites and how they move around the earth?

Ans 1: Satellites are the objects that orbit around the earth.They are put into orbit by rockets and are held in orbits by the gravitational pull of the earth.

Question # 3

Define Moment of Inertia.Write its formula.

Ans 1: The property of the body to resist any change in its state of rest or uniform angular velocity is called moment of inertia. For a point mass 'm'situated at a distance 'r' from the axis of rotation , the moment of inertia 'I' is given by ; I=mr²
Significance;
Moment of inertia plays the same role in angular motion as that of mass plays in linear motion. It is also called measure of rotational inertia in angular motion.Moment of inertia determines the angular acceleration while mass determines the linear acceleration.

Question # 4

Why you wear seat belts?

Ans 1: During collision, the passengers move forward towards the windscreen due to inertia. The seat belt prevents the passenger from moving forward. And lessened the chances of injury.

Question # 5

Define angular momentum and give its dimension.

Ans 1:

Question # 6

State the law of conversation of angular momentum.

Ans 1:

Question # 7

Write down application of communication satellites.

Ans 1: A satellite communication system consist of three geo-stationary satellites.There are over 200 Earth stations which can transmit and receive signals.INTELSAT-VI operates at microwave frequencies 4, 4, 11 and 14 Ghz and has a capacity of 30,000 two way telephone circuits plus three TV channels.
Geo-stationary satellite are very useful for worldwide communication,weather observation, navigation, and other military uses.

Question # 8

Define centripetal force; write its formula and unit.

Ans 1:

Question # 9

When mud files off the tyre of a moving bicycle, I what direction does it fly?

Ans 1: Adhesive force between mud and tire is weal. When the mud files off the tyre of a moving bicycle, it always files along the tangent to the tyre. Because linear velocity is always tangent to the circle.

Question # 10

What are geostationary orbit and geostationary satellites?

Ans 1: Geostationary Orbit: An orbit in which the time period of satellite is equal to the time period of spin motion of the earth is called geostationary orbit.

Geostationary Satellites: A satellite whose orbital motion is stationary along the earth is called geostationary satellite.

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ICS Part 1 Physics Chapter 5 Short Questions Test - Set 2

Question # 1

What is meant by centripetal force? Write down its formula.

Ans 1:

Question # 2

Define Moment of Inertia.Write its formula.

Ans 1: The property of the body to resist any change in its state of rest or uniform angular velocity is called moment of inertia. For a point mass 'm'situated at a distance 'r' from the axis of rotation , the moment of inertia 'I' is given by ; I=mr²
Significance;
Moment of inertia plays the same role in angular motion as that of mass plays in linear motion. It is also called measure of rotational inertia in angular motion.Moment of inertia determines the angular acceleration while mass determines the linear acceleration.

Question # 3

State the law of conversation of angular momentum.

Ans 1:

Question # 4

Define angular velocity give its units and dimensions.

Ans 1: The rate of change of angular displacement is called angular velocity. The direction of angular velocity is along the axis of rotations of the body.
S.I unit of angular velocity = rad/s
Dimensions of angular velocity = [T^-1]

Question # 5

An object orbiting around the earth in said to be a freely falling body. Why?

Ans 1: An object in orbits is said to be freely falling , because the trajectory of its fall has the same curvature as Earth's surface. In fact, the object is falling towards the center of earth but because of spherical shape of earth, it never reaches the surface of earth.

Question # 6

Explain the difference between tangential velocity and angular velocity.

Ans 1: The linear velocity of a particle moving along a curve or circle is called tangential velocity. Its direction is always along the tangent to the circle.
The rate of change of angular displacement is called angular velocity.The direction of angular velocity is along the axis of rotation of the body by right hand rule. V= rw

Question # 7

State the direction of the following vectors in simple situation:
A) Angular Momentum B) Angular Velocity

Ans 1: The direction of angular momentum and angular velocity can be determined by right hand rule;
"Grasp the axis of rotation in right hand with the figures curling in the direction of rotation, then the erect thumb will give the direction of angular velocity and angular momentum."

Question # 8

Why Einstein views of gravitation are preferred than Newton's views of gravitation? Explain briefly

Ans 1: Newton discovered the inverse square law of gravity. Einstein's theory also says that gravity follows an inverse square law (except in strong gravitational fields), but it gives us a physical picture of how gravity works. The bending of star light caused by the gravity of the Sun was measured during a solar eclipse in 1919, it was found to match Einstein's Prediction rather than Newton's.

Question # 9

Why banked tracks are needed for turns?

Ans 1: Banked tracks are needed because friction alone cannot provide energy for centripetal force.
If the road is banked, so that the outer edge is above the inner edge, then a portion of the normal force from the road on the tyre points towards the center of the track; this fraction of the normal force can provide enough centripetal force to keep the car moving in a circle.

Question # 10

Explain conservation of direction of angular momentum.

Ans 1: The direction of angular momentum along the axis of rotation remains fixed. This is due to the fact that the axis of rotation of an object will not change its orientation unless an external torque causes it to do so .

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ICS Part 1 Physics Chapter 5 Short Questions Test - Set 3

Question # 1

State the right hand rule to find the direction of angular displacement.

Ans 1: It states that
"Grasp the axis of rotation in right hand with the fingers curling in the direction of rotation , then the erect thumb will give the direction of angular velocity and angular momentum"

Question # 2

Define Moment of Inertia.Write its formula.

Ans 1: The property of the body to resist any change in its state of rest or uniform angular velocity is called moment of inertia. For a point mass 'm'situated at a distance 'r' from the axis of rotation , the moment of inertia 'I' is given by ; I=mr²
Significance;
Moment of inertia plays the same role in angular motion as that of mass plays in linear motion. It is also called measure of rotational inertia in angular motion.Moment of inertia determines the angular acceleration while mass determines the linear acceleration.

Question # 3

Write down application of communication satellites.

Ans 1: A satellite communication system consist of three geo-stationary satellites.There are over 200 Earth stations which can transmit and receive signals.INTELSAT-VI operates at microwave frequencies 4, 4, 11 and 14 Ghz and has a capacity of 30,000 two way telephone circuits plus three TV channels.
Geo-stationary satellite are very useful for worldwide communication,weather observation, navigation, and other military uses.

Question # 4

What is meant by INTEL SAT? At what frequencies the INELSAT-VI operates ?

Ans 1: The largest satellite system managed by 126 countries is international. Telecommunication Satellite Organization (INTELSAT).
The INELSAT-VI operates at microwaves frequencies of 4, 6, 11 and 14 Ghz.

Question # 5

How would you determine the direction of angular momentum?

Ans 1: The direction of angular momentum can be determined by right hand rule:
"Grasp the axis of rotation in right hand with the figures curling in the direction rotation then the erect thumb will give the direction of angular momentum."

Question # 6

What are geostationary orbit and geostationary satellites?

Ans 1: Geostationary Orbit: An orbit in which the time period of satellite is equal to the time period of spin motion of the earth is called geostationary orbit.

Geostationary Satellites: A satellite whose orbital motion is stationary along the earth is called geostationary satellite.

Question # 7

Define angular displacement and write its S.I unit.

Ans 1:

Question # 8

Define angular displacement.

Ans 1:

Question # 9

Why Einstein views of gravitation are preferred than Newton's views of gravitation? Explain briefly

Ans 1: Newton discovered the inverse square law of gravity. Einstein's theory also says that gravity follows an inverse square law (except in strong gravitational fields), but it gives us a physical picture of how gravity works. The bending of star light caused by the gravity of the Sun was measured during a solar eclipse in 1919, it was found to match Einstein's Prediction rather than Newton's.

Question # 10

State the law of conversation of angular momentum.

Ans 1:

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5th Chapter

ICS Part 1 Physics Short Questions Test

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ICS Part 1 Physics English Medium Chapter 5 Online Short Questions Test with Answers

Online Short Questions For Chapter 5 "ICS Part 1 Physics Chapter 5 Short Questions Test "

Physics - ICS Part 1 Physics Chapter 5 Short Questions Test

What is meant by moment of inertia? Explain its significance.

What are Artificial Satellites and how they move around the earth?

Define Moment of Inertia.Write its formula.

Why you wear seat belts?

Define angular momentum and give its dimension.

State the law of conversation of angular momentum.

Write down application of communication satellites.

Define centripetal force; write its formula and unit.

When mud files off the tyre of a moving bicycle, I what direction does it fly?

What are geostationary orbit and geostationary satellites?

Prepare Complete Set Wise Questions For Chapter 5 "ICS Part 1 Physics Chapter 5 Short Questions Test "

Set 1

Set 2

Set 3

ICS Part 1 Physics Chapter 5 Short Questions Test - Set 1

What is meant by moment of inertia? Explain its significance.

What are Artificial Satellites and how they move around the earth?

Define Moment of Inertia.Write its formula.

Why you wear seat belts?

Define angular momentum and give its dimension.

State the law of conversation of angular momentum.

Write down application of communication satellites.

Define centripetal force; write its formula and unit.

When mud files off the tyre of a moving bicycle, I what direction does it fly?

What are geostationary orbit and geostationary satellites?

ICS Part 1 Physics Chapter 5 Short Questions Test - Set 2

What is meant by centripetal force? Write down its formula.

Define Moment of Inertia.Write its formula.

State the law of conversation of angular momentum.

Define angular velocity give its units and dimensions.

An object orbiting around the earth in said to be a freely falling body. Why?

Explain the difference between tangential velocity and angular velocity.

State the direction of the following vectors in simple situation:A) Angular Momentum B) Angular Velocity

Why Einstein views of gravitation are preferred than Newton's views of gravitation? Explain briefly

Why banked tracks are needed for turns?

Explain conservation of direction of angular momentum.

ICS Part 1 Physics Chapter 5 Short Questions Test - Set 3

State the right hand rule to find the direction of angular displacement.

Define Moment of Inertia.Write its formula.

Write down application of communication satellites.

What is meant by INTEL SAT? At what frequencies the INELSAT-VI operates ?

How would you determine the direction of angular momentum?

What are geostationary orbit and geostationary satellites?

Define angular displacement and write its S.I unit.

Define angular displacement.

Why Einstein views of gravitation are preferred than Newton's views of gravitation? Explain briefly

State the law of conversation of angular momentum.

ICS Part 1 Physics Short Questions Test

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State the direction of the following vectors in simple situation:
A) Angular Momentum B) Angular Velocity