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JEE Main Physics question

PhysicsGravitationJEE Main

The value of at a particular point is 9.8 m/s². Suppose the earth suddenly shrinks uniformly to half of its present size without losing any mass. The value of at the same point (assuming that the distance of the point from the centre of earth does not shrink) will now be [NCERT 1984, DPMT 1999]

Answer: (C)

Solution

Since the point's distance from the centre stays the same, and the mass is unchanged, the exterior-field formula is

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Question ID VK-154590