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 are Artificial Satellites?

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

Question # 2

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 # 3

Define angular displacement.

Ans 1:

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

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 # 6

Explain why earth's satellite despite of being freely falling object does not reach the earth.

Ans 1: To orbit the planet and not come crashing down, a spacecraft has to travel forward (tangential to Earth ) fast enough that it compensates for the fall downwards. The trajectory of its fall has the same curvature as earth's surface. So it will never reach the earth.

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

State the law of conversation of angular momentum.

Ans 1:

Question # 9

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 # 10

What is mean by angular momentum?

Ans 1:

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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 are Artificial Satellites?

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

Question # 2

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 # 3

Define angular displacement.

Ans 1:

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

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 # 6

Explain why earth's satellite despite of being freely falling object does not reach the earth.

Ans 1: To orbit the planet and not come crashing down, a spacecraft has to travel forward (tangential to Earth ) fast enough that it compensates for the fall downwards. The trajectory of its fall has the same curvature as earth's surface. So it will never reach the earth.

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

State the law of conversation of angular momentum.

Ans 1:

Question # 9

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 # 10

What is mean by angular momentum?

Ans 1:

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

Question # 1

On what factors moment of inertia depends?

Ans 1: The moment of inertia is I =mr²
^{So it depends upon the mass of the body and its distance from the axis of rotation.}

Question # 2

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

Ans 1:

Question # 3

What is mean by angular momentum?

Ans 1:

Question # 4

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 # 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 is meant by centripetal force?Write down its formula

Ans 1:

Question # 7

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 # 8

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 # 9

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 # 10

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.

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

Question # 1

Define centripetal force; write its formula and unit.

Ans 1:

Question # 2

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 # 3

Define centripetal force and centripetal acceleration.

Ans 1: The force needed to bend the normally straight path of the particle into a circular path is called the centripetal force.
The instantaneous acceleration of an object traveling with uniform speed in a circle is directed towards the centre of the circle and is called centripetal acceleration.

Question # 4

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 # 5

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 # 6

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 # 7

On what factors moment of inertia depends?

Ans 1: The moment of inertia is I =mr²
^{So it depends upon the mass of the body and its distance from the axis of rotation.}

Question # 8

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 # 9

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 # 10

Explain why earth's satellite despite of being freely falling object does not reach the earth.

Ans 1: To orbit the planet and not come crashing down, a spacecraft has to travel forward (tangential to Earth ) fast enough that it compensates for the fall downwards. The trajectory of its fall has the same curvature as earth's surface. So it will never reach the earth.

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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 are Artificial Satellites?

What are geostationary orbit and geostationary satellites?

Define angular displacement.

Why you wear seat belts?

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

Explain why earth's satellite despite of being freely falling object does not reach the earth.

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

State the law of conversation of angular momentum.

Explain the difference between tangential velocity and angular velocity.

What is mean by angular momentum?

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 are Artificial Satellites?

What are geostationary orbit and geostationary satellites?

Define angular displacement.

Why you wear seat belts?

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

Explain why earth's satellite despite of being freely falling object does not reach the earth.

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

State the law of conversation of angular momentum.

Explain the difference between tangential velocity and angular velocity.

What is mean by angular momentum?

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

On what factors moment of inertia depends?

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

What is mean by angular momentum?

Why banked tracks are needed for turns?

How would you determine the direction of angular momentum?

What is meant by centripetal force?Write down its formula

Define angular velocity, How its direction is determined?

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

What are geostationary orbit and geostationary satellites?

Define Moment of Inertia.Write its formula.

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

Define centripetal force; write its formula and unit.

How would you determine the direction of angular momentum?

Define centripetal force and centripetal acceleration.

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

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

Write down application of communication satellites.

On what factors moment of inertia depends?

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

What are geostationary orbit and geostationary satellites?

Explain why earth's satellite despite of being freely falling object does not reach the earth.

ICS Part 1 Physics Short Questions Test

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