The value of g decreases inside the surface of earth because **[MHT-CET 2010]**

JEE Main Physics question

The value of decreases inside the surface of earth because **[MHT-CET 2010]**

(A)A force of upward attraction is applied by the shell of earth above
(B)The shell of earth above exerts no net forceCorrect
(C)The distance from the centre of the earth decreases
(D)The density of the material at the centre of earth is very small

Answer: (B)

Solution

By the shell theorem, the spherical shell of the earth above a point at depth exerts zero net gravitational force on that point, so only the mass of the sphere of radius

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Question ID VK-154275