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JEE Main Physics question

PhysicsGravitationJEE Main

In the following four periods: (i) Time of revolution of a satellite just above the earth's surface, (ii) Period of oscillation of mass inside a tunnel bored along a diameter of the earth, (iii) Period of a simple pendulum having a length equal to the earth's radius in a uniform field of , (iv) Period of an infinite-length simple pendulum in the earth's real gravitational field. [AMU 2000]

Answer: (D)

Solution

For a surface-grazing orbit, (using ); the tunnel-oscillation period and the simple pendulum of length in uniform both give the identical

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Question ID VK-154685