Physics

1. Gravitational mass is proportional to the gravitational:

None of these

Force

Field

Intensity

Question 1 of 15

2. The value of acceleration due to gravity, at earth surface is g. Its value at the center of the earth, which we assume as a sphere of radius R and of uniform mass density, will be:

20 R m/s²

5 R m/s

Zero

10 R m/s²

Question 2 of 15

3. The ratio of the radii of two planets r₁ and r₂ is k. The ratio of acceleration due to gravity on them is r. then the ratio of the escape velocities from them, will be:

√k/r

√r/k

√kr

Question 3 of 15

4. Hubble’s law is related with

Black hole

Comet

Planetary motion

Speed of galaxy

Question 4 of 15

5. The earth rotates about the sun in an elliptical orbit as shown in figure. At which point its velocity will be maximum?

at B

at D

at A

at C

Question 5 of 15

6. The velocity with which a projectile must be fired so that it escapes earth’s gravitation does not depend on:

Radius of the projectile’s orbit

Gravitational constant

Mass of the projectile

Mass of the earth

Question 6 of 15

7. The escape velocity from the earth is 11.2 km/sec. the escape velocity from a planet having twice the radius and the same mean density as the earth, is:

22.4 km/sec

15.00 km/sec

5.8 km/sec

11.2 km/sec

Question 7 of 15

8. A long straight wire or radius a carries a steady current I. The current is uniformly distributed across its cross section. The ratio of the magnetic field at a/2 and 2a is

1/4

1/2

Question 8 of 15

9. The force of gravitation is

Repulsive

Conservative

Electrostatic

Non- Conservative

Question 9 of 15

10. A satellite is launched into a circular orbit of radius R around the earth. While a second satellite launched into an orbit of radius 1.01R. The period of the second satellite is longer than the first one by approximately

1.5%

1.0%

0.7%

3.0 %

Question 10 of 15

11. The angular speed of earth in rad/s, so that bodies on equator may appear weightless is: [Use g = 10 m/s² and the radius of earth = 6.4 x 10³ km]

1.56

1.56 x 10⁻³

1.25 x 10⁻¹

1.25 x 10⁻³

Question 11 of 15

12. If the mass of moon is M/81, where M is the mass of earth, find the distance of the point from the moon, where gravitational field due to earth the moon cancel each other. Given that distance between earth and moon is 60R where R is the radius of earth

8 R

6 R

2 R

4 R

Question 12 of 15

13. If a mass of a body is M on the earth surface, the mass of the same body on moon surface will be

Zero

M/6

None of these

Question 13 of 15

14. A satellite S is moving in an elliptical orbit around the earth. The mass of the satellite is very small compared to the mass of the earth. Then

The angular momentum of S about the center of the earth changes in direction, but its magnitude remains constant

The acceleration of S is always directed towards the center of the earth

The linear momentum of S remains constant in magnitude

The total mechanical energy of S varies periodically with time

Question 14 of 15

15. If the earth were to cease rotating about its own axis. The increase in the value of g in C.G.S. system at a place of latitude of 45° will be

2.68

0.34

3.36

1.68

Question 15 of 15

Test Name	Gravitation MCQs Test
Subject	Physics
Test Type	MCQs
Total Question	15
Total Marks	30
Total Time	15 Mints
Test Help For	Physics Subject Test Prep. All Admissions Test. All Jobs and recruitment Test prep. Medical and BDS Test prep. Engineering and B Tech Test prep.

Test By Subject	Physics
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Physics Gravitation Test 2 Online MCQs

Physics Gravitation Test 2 Online MCQs

Physics

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