(Set 1) Gravitation

1. Michael Faraday
2. Guglielmo Marconi
3. James Watt
4. Isaac Newton

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1. It is experienced by all bodies in the universe.
2. It is a dominant force between celestial bodies.
3. It is a negligible force for atoms.
4. It is same for all pairs of bodies in our universe.

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1. Gravitational force is stronger than the other two.
2. Gravitational force is attractive only, whereas the electric and the magnetic forces are attractive as well as repulsive.
3. Gravitational force has a very short range.
4. Gravitational force is a long range force, while the other two are short range forces.

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1. F
2. 2F
3. 4F
4. 1/4F

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1. 16 F
2. 1 F
3. 4 F
4. None of these

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1. twice as large as it is now.
2. four times as large as it is now.
3. one-fourth of what it is now.
4. Half of what it is now.

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1. decrease in radius of the planet
2. increase in mass of the planet
3. decrease in mass of the body
4. increase in altitude from surface of the planet

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1. At equator
2. At tropic cancer
3. At tropic of Capricorn
4. At poles

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1. g is the same at all places on the surface of the earth.
2. g is less at the earth's surface than at a height above or at a depth below it.
3. g has its maximum value at the equator.
4. g is greater at the poles than at the equator.

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1. 9 g
2. g/3
3. 3 g
4. g/9

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1. is greater at the poles than at the equator
2. is less at the North poles than the equator
3. is greater at the North pole than at the South pole
4. is greater at the South pole than at the North pole

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1. earth is a sphere with same density everywhere
2. earth is a sphere with different density at the polar regions than in the equatorial regions
3. earth is approximately an ellipsoid having its equatorial radius greater than its polar radius by 21 km
4. earth is approximately an ellipsoid having its equatorial radius smaller than its polar radius by 21 km.

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1. It changes from one place to another .
2. It is same everywhere.
3. It depends on its shape.
4. It does not depend on its temperature.

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1. 1/6th
2. 1/8th
3. 1/4th
4. 1/10th

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1. 150 N
2. 75 N
3. 25 N
4. 50 N

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1. the lift is going up with an acceleration
2. the lift is going down with uniform speed
3. the lift is going up with uniform speed
4. the lift is going down with an acceleration

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1. Inertia
2. Acceleration
3. Zero gravity
4. Orbital motion

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1. Weight of a body is different on different planets.
2. Mass of a body on the earth, on moon and in empty space is the same.
3. Weightlessness of a body occurs when the gravitational forces acting on it is counter balanced.
4. Weight and mass of a body are equal at sea level on the surface of the earth.

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1. The measurement of mass taken by a spring weighing balanced is correct at place where the spring balance is calibrated for.
2. The measurement of mass taken by a spring weighing balance is correct at all places.
3. The measurement of mass taken by a spring weighing balance is correct at the places where the acceleration due to gravity is same with the place where the spring balanced is calibrated for.
4. A spring balance cannot be used to measure mass at any place.

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1. 10 kg
2. 60 N
3. 60 kg
4. 10N

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