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At what depth from the earth surface, the value of acceleration due to gravity will be half as that on the surface of earth? ( R is radiusof earth )

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Important Questions on Gravitation

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Gamma Question Bank for Medical Physics>Chapter 8 - Gravitation>Assignment>Q 4
Which one of the following plots represent the variation of gravitational potential V with distance r due to a thin spherical shell of radius?(r is measured from the center of shell)
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Gamma Question Bank for Medical Physics>Chapter 8 - Gravitation>Assignment>Q 5
If the angular speed of earth increases, then the value of acceleration due to gravity at poles 
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Gamma Question Bank for Medical Physics>Chapter 8 - Gravitation>Assignment>Q 6
Which of the following is not correct about gravitational force.
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Gamma Question Bank for Medical Physics>Chapter 8 - Gravitation>Assignment>Q 7
When a body is taken from the equator to the poles, its mass
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Gamma Question Bank for Medical Physics>Chapter 8 - Gravitation>Assignment>Q 8
At what height from the surface of earth, the acceleration due to gravity be 25% of that at the earth's surface? (Radius of earth is R)
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Gamma Question Bank for Medical Physics>Chapter 8 - Gravitation>Assignment>Q 9
What is the ratio of escape velocity to the orbital velocity for the satellite revolving near earth?
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Gamma Question Bank for Medical Physics>Chapter 8 - Gravitation>Assignment>Q 10
Which of the following curves show the variation of acceleration due to gravity from the center of earth to the points far away from the surface of earth?
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Gamma Question Bank for Medical Physics>Chapter 8 - Gravitation>Assignment>Q 11
All the planets move in elliptical orbit, with sun at one of the _____ of the ellipse.