Gravitation Test

Result

Gravitation Test - 51

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Weekly Quiz Competition

Question 1
4 / -1

An earth satellite of mass m revolves in a circular orbit at a height h from the surface of the earth. R is the radius of the earth and g is acceleration due to gravity at the surface of the earth. The velocity of the satellite in the orbit is given by

A

B

C

D

Solution
Question 2
4 / -1

Two satellites of masses m₁ and m₂ (m₁ > m₂) are revolving round the earth in circular orbits of radius r₁ and r₂(r₁>r₂) respectively. Which of the following statements is true regarding their speeds v₁ and v₂ ?

A
v₁ = v₂

B
v₁ < v₂

C
v₁ > v₂

D

Solution
Question 3
4 / -1

A satellite which is geostationary in a particular orbit is taken to another orbit. Its distance from the centre of earth in new orbit is 2 times that of the earlier orbit. The time period in the second orbit is

A
4.8 hr

B
48√2 hr

C
24 hr

D
24√2 hr

Solution
Question 4
4 / -1

The time period of a geostationary satellite at a height 36000 km is 24 hr. A spy satellite orbits very close to earth surface (R = 6400 km). What will be its time period ?

A
4 hrs

B
1 hrs

C
2 hrs

D
1.5 hrs

Solution
Question 5
4 / -1

The period of a satellite in a circular orbit around a planet is independent of

A
The mass of the planet

B
The radius of the planet

C
The mass of the satellite

D
All the three parameters (1), (2) and (3)
Question 6
4 / -1

The relay satellite transmits the T.V. programme continuously from one part of the world to another because its

A
Period is greater than the period of rotation of the earth

B
Period is less than the period of rotation of the earth about its axis

C
Period has no relation with the period of the earth about its axis

D
Period is equal to the period of rotation of the earth about its axis
Question 7
4 / -1

A geostationary satellite

A
Revolves about the polar axis

B
Has a time period less than that of the near earth satellite

C
Moves faster than a near earth satellite

D
Is stationary in the space
Question 8
4 / -1

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 closest to the earth

C
Is greatest when it is farthest from the earth

D
Goes on increasing or decreasing continuously depending upon the mass of the satellite
Question 9
4 / -1

The orbital velocity of an artificial satellite in a circular orbit just above the earth\'s surface is v. For a satellite orbiting at an altitude of half of the earth\'s radius, the orbital velocity is

A

B

C

D

Solution
Question 10
4 / -1

In a satellite if the time of revolution is T, then K.E is proportional to

A

B

C

D

Solution