Engineering Entrance Sample Papers

Satellite Communication Questions and Answers

questions-about-satellite

Satellite Motion Physics Problems

Question 1
Which is constant for a satellite in orbit?

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A
Acceleration
B
Angular momentum
C
Velocity
D
Potential energy
Question 2
The time period of a satellite of earth is 5 hours. If the separation between the earth and the satellite is increased to four times the previous value, the new time period will become
A
80 hours
B
10 hours
C
40 hours
D
20 hours
Question 3
The relay satellite transmits the T.V. programme continuously from one part of the world to another because its
A
Period has no relation with the period of the earth about its axis
B
Period is less than the period of rotation of the earth about its axis
C
Period is greater than the period of rotation of the earth
D
Period is equal to the period of rotation of the earth about its axis
Question 4
If Gravitational constant is decreasing in time, what will remain unchanged in case of a satellite orbiting around earth
A
Orbiting radius
B
Angular velocity
C
Tangential velocity
D
Time period
Question 5
The ratio of the K.E. required to be given to the satellite to escape earth's gravitational field to the K.E. required to be given so that the satellite moves in a circular orbit  just  above earth atmosphere is
A
One
B
Two
C
Infinity
D
Half
Question 6
Which one of the following statements regarding artificial satellite of the earth is incorrect
A
The period of revolution is large if the radius of its orbit is large
B
A minimum velocity of 8 km/sec is required by a satellite to orbit quite close to the earth
C
The height of a geostationary satellite is about 36000 km from earth
D
The orbital velocity depends on the mass of the satellite
Question 7
Consider a satellite going round the earth in an orbit. Which of the following statements is wrong
A
It is a freely falling body
B
It suffers no acceleration
C
Its angular momentum remains constant
D
It is moving with a constant speed
Question 8
Out of the following, the only incorrect statement about satellites is

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A
The speed of a satellite increases with an increase in the radius of its orbit
B
We can use just one geostationary satellite for global communication around the globe
C
Geostationary satellites are launched in the equatorial plane
D
A satellite cannot move in a stable orbit in a plane passing through the earth's centre
Question 9
Choose the correct statement from the following : The radius of the orbit of a geostationary satellite depends upon
A
Mass of the satellite, its time period and the gravitational constant
B
Mass of the earth, mass of the satellite, time period of the satellite and the gravitational constant
C
Mass of the satellite, mass of the earth and the gravitational constant
D
Mass of the earth, time period of the satellite and the gravitational constant
Question 10
A ball is dropped from a spacecraft revolving around the earth at a height of 120 km. What will happen to the ball
A
It will go very far in the space
B
It will continue to move with velocity v along the original orbit of spacecraft
C
It will fall down to the earth gradually
D
It will move with the same speed tangentially to the spacecraft
Question 11
A geostationary satellite

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A
Has a time period less than that of the near earth satellite
B
Moves faster than a near earth satellite
C
Is stationary in the space
D
Revolves about the polar axis
Question 12
Select the correct statement from the following
A
The orbital velocity of a satellite increases with the radius of the orbit
B
The orbital velocity is inversely proportional to the square root of the radius of the orbit
C
Escape velocity of a particle from the surface of the earth depends on the speed with which it is fired
D
The time period of a satellite does not depend on the radius of the orbit
Question 13
A person sitting in a chair in a satellite feels weightless because
A
The normal force is zero
B
The person in satellite is not accelerated
C
The earth does not attract the objects in a satellite
D
The normal force by the chair on the person balances the earth's attraction
Question 14
Which of the following statements is correct in respect of a geostationary satellite?
A
Its height above the earth’s surface is about the same as the radius of the earth
B
Its height above the earth’s surface is about six times the radius of the earth
C
It moves in a plane containing the Greenwich meridian
D
It moves in a plane perpendicular to the celestial equatorial plane
Question 15
The periodic time of a communication satellite is

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A
18 hours
B
6 hours
C
12 hours
D
24 hours
Question 16
A satellite revolves around the earth in an elliptical orbit. Its speed
A
Is the same at all points in the orbit
B
Is greatest when it is farthest from the earth
C
Is greatest when it is closest to the earth
D
Goes on increasing or decreasing continuously depending upon the mass of the satellite
Question 17
To an astronaut in a spaceship, the sky appears
A
Black
B
White
C
Blue
D
Green
Question 18
The weight of an astronaut, in an artificial satellite revolving around the earth, is
A
Less than that on the earth
B
Zero
C
More than that on the earth
D
Equal to that on the earth
Question 19
Where can a geostationary satellite be installed?

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A
At height R above earth
B
Over any city on the equator
C
At the surface of earth
D
Over the north or south pole
Question 20
If a satellite is orbiting the earth very close to its surface, then the orbital velocity mainly depends on
A
The mass of the satellite only
B
The mass of the earth only
C
The radius of the earth only
D
The orbital radius only
There are 20 questions to complete.
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Vishal Arora

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