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

Define angular displacement.

Ans 1:

Question # 2

What is Geo-stationay satellite? How many minimum number of geo-stationary satellites are required fro global coverage coverage of T.V transmission ?

Ans 1: S satellite whose orbital motion is stationary along the earth is called geostationary satellite. The time period of satellite is equal to the time period of spin motion of the earth.
A geostationary satellite covers 120° of longitude. So the whole earth can be covered by three correctly positioned geo-stationary satellites.

Question # 3

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 # 4

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 # 5

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 # 6

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 # 7

Explain how many minimum number of Geo-stationary satellites are required for global coverage of T.V transmission.

Ans 1: A geostationary satellite covers 120° of longitude. So the whole earth can be covered by three correctly positioned geostationary satellites.

Question # 8

Why the microwaves are used in satellite communication?

Ans 1: Micro waves are used in satellite communication because they travel in a narrow beam, in a straight line and pass easily through the atmosphere of the earth.

Question # 9

State the law of conversation of angular momentum.

Ans 1:

Question # 10

What are Artificial Satellites?

Ans 1: Artificial Satellites are the man-made objects that orbit around the Earth.

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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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Set 2

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

Question # 1

Define angular displacement.

Ans 1:

Question # 2

What is Geo-stationay satellite? How many minimum number of geo-stationary satellites are required fro global coverage coverage of T.V transmission ?

Ans 1: S satellite whose orbital motion is stationary along the earth is called geostationary satellite. The time period of satellite is equal to the time period of spin motion of the earth.
A geostationary satellite covers 120° of longitude. So the whole earth can be covered by three correctly positioned geo-stationary satellites.

Question # 3

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 # 4

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 # 5

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 # 6

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 # 7

Explain how many minimum number of Geo-stationary satellites are required for global coverage of T.V transmission.

Ans 1: A geostationary satellite covers 120° of longitude. So the whole earth can be covered by three correctly positioned geostationary satellites.

Question # 8

Why the microwaves are used in satellite communication?

Ans 1: Micro waves are used in satellite communication because they travel in a narrow beam, in a straight line and pass easily through the atmosphere of the earth.

Question # 9

State the law of conversation of angular momentum.

Ans 1:

Question # 10

What are Artificial Satellites?

Ans 1: Artificial Satellites are the man-made objects that orbit around the Earth.

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

Question # 1

Why is the axis of rotation of Earth remains fixed in one direction with respect to the universe around it?

Ans 1: The major force acting on Earth is the pull of the Sun and no other sizeable toque is experienced by it. The Earth's axis of rotation, therefore remains fixed in one direction with reference to the universe around us.

Question # 2

State the law of conversation of angular momentum.

Ans 1:

Question # 3

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 # 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

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 # 6

Define angular velocity, How its direction is determined?

Ans 1: The rate of change of angular displacement is called angular velocity. The direction of angular velocity is along the axis of rotation and 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."

Question # 7

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 # 8

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 # 9

Define angular displacement and write its S.I unit.

Ans 1:

Question # 10

What is Geo-stationay satellite? How many minimum number of geo-stationary satellites are required fro global coverage coverage of T.V transmission ?

Ans 1: S satellite whose orbital motion is stationary along the earth is called geostationary satellite. The time period of satellite is equal to the time period of spin motion of the earth.
A geostationary satellite covers 120° of longitude. So the whole earth can be covered by three correctly positioned geo-stationary satellites.

Submit

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

Question # 1

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 # 2

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 # 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

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 # 5

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

Ans 1:

Question # 6

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 # 7

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 # 8

State the law of conversation of angular momentum.

Ans 1:

Question # 9

Define angular velocity, How its direction is determined?

Ans 1: The rate of change of angular displacement is called angular velocity. The direction of angular velocity is along the axis of rotation and 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."

Question # 10

What is mean by angular momentum?

Ans 1:

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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

Define angular displacement.

What is Geo-stationay satellite? How many minimum number of geo-stationary satellites are required fro global coverage coverage of T.V transmission ?

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

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

Define angular velocity give its units and dimensions.

Why banked tracks are needed for turns?

Explain how many minimum number of Geo-stationary satellites are required for global coverage of T.V transmission.

Why the microwaves are used in satellite communication?

State the law of conversation of angular momentum.

What are Artificial 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

Define angular displacement.

What is Geo-stationay satellite? How many minimum number of geo-stationary satellites are required fro global coverage coverage of T.V transmission ?

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

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

Define angular velocity give its units and dimensions.

Why banked tracks are needed for turns?

Explain how many minimum number of Geo-stationary satellites are required for global coverage of T.V transmission.

Why the microwaves are used in satellite communication?

State the law of conversation of angular momentum.

What are Artificial Satellites?

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

Why is the axis of rotation of Earth remains fixed in one direction with respect to the universe around it?

State the law of conversation of angular momentum.

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

Why you wear seat belts?

Explain the difference between tangential velocity and angular velocity.

Define angular velocity, How its direction is determined?

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

How would you determine the direction of angular momentum?

Define angular displacement and write its S.I unit.

What is Geo-stationay satellite? How many minimum number of geo-stationary satellites are required fro global coverage coverage of T.V transmission ?

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

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

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

Define Moment of Inertia.Write its formula.

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

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

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

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

State the law of conversation of angular momentum.

Define angular velocity, How its direction is determined?

What is mean by 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

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

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