MCQ on Gravitation. We covered all the MCQ on Gravitation in this post for free so that you can practice well for the exam.
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MCQ on Gravitation for Students
The escape velocity of a body from the earth is 4, what is the escape velocity from a planet whose mass and radius are twice those of earth?
1. 3u
2. 8u
3. u
4. 4u
Option 3 – u
A body of mass m rises to height h = R/5 from the surface of the earth. If g is the acceleration due to gravity at the earth’s surface, the increase in potential energy is
1. 5/6 mgh
2. 6/7 mgh
3. mgh
4. none of above
Option 1 – 5/6 mgh
R The eccentricity of the earth’s orbit is 0.0167. The ratio of its maximum speed in its orbit to its minimum speed is
1. 3.033
2. 1.000
3. 2.666
4. 1.033
Option 4 – 1.033
A body of mass 2kg is moving under the influence of a central force whose potential energy is given by U(r)=2r³ Joules. If the body is moving in a circular orbit of 5m. Its energy will be
1. 625 Joules
2. 250 Joules
3. 325 Joules
4. 500 Joules
Option 1 – 625 Joules
Kepler’s second law regarding constancy of the aerial velocity of a planet is a consequence of the law of conservation of
1. angular momentum
2. energy
3. linear momentum
4. none of above
Option 1 – angular momentum
Which of the following bodies has the smallest moment of inertia?
1. Sphere
2. Ring
3. Cylinder
4. none of above
Option 1 – Sphere
Increase of height from the surface of the earth, the value of ‘g’
1. decreases
2. increases
3. constant
4. none of above
Option 1 – decreases
Four particles of mass ‘m’ are placed on the four corners of a square of side L meter. Calculate the gravitational force on the fifth particle of mass ‘m’ placed at the center of the square.
1. Zero
2. 1N L
3. -1N
4. 2N
Option 1 – Zero
If the diameter of the earth becomes two times its present value and its mass remains unchanged then how the weight of an object on the surface of the earth is affected?
1. Becomes half of the originated value
2. Becomes one-fourth of the original value
3. Becomes one-fifth of the original value
4. Does not change
Option 2 – Becomes one-fourth of the original value
If a body is taken from the equator to the pole, then how the weight of the body will change
1. It will decrease
2. It will increase
3. It will not change
4. None
Option 2 – It will increase
The ratio of initial mass to gravitational mass is
1. 2
2. 3
3. 4
4. 1
Option 4 – 1
What will be the value of acceleration due to gravity at a height R from the surface of the earth, where ‘R’ is the radius of the earth
1. g/2
2. g/5
3. g/4
4. g/6
Option 3 – g/4
The time period of a simple pendulum inside a satellite orbiting earth is
1. infinite
2. T
3. zero
4. 2T
Option 1 – infinite
A satellite is orbiting a planet at a certain weight in a circular orbit, if the mass of the planet is suddenly produced to half the satellite would
1. orbit the planet at a lesser speed
2. continue to revolve around the planet at the same speed
3. escape from the planet
4. falls freely on the planet
Option 1 – orbit the planet at a lesser speed
Two air bubbles in the water
1. attract each other
2. repel each other
3. neither attract nor repel
4. none of above
Option 1 – attract each other
Two heavenly bodies S, and S₂ not far off from each other are seen to revolve in orbits
1. around their common center of mass
2. with S, fixed and S, moving around
3. with S, fixed and S, moving around S₂
4. which are arbitrary
Option 1 – around their common center of mass
A satellite is launched into a circular orbit of radius R around the earth. A second satellite into an orbit of radius 1.01R. The period of the second satellite is larger than the first one by approximately
1. 1%
2. 0.77%
3. 1.5%
4. 2%
Option 3 – 1.5%
If there were a smaller gravitational effect, which of the following forces do you think would alter in some respect
1. Archemedis uplift
2. viscous force
3. electrostatic force
4. none of above
Option 1 – Archemedis uplift
The time period of a geostationary satellite is
1. 34 hours
2. 24 hours
3. 256 hours
4. none of above
Option 2 – 24 hours
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