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Question 30769
JEE Physics · Medium

Gravitation: JEE — Field Inside Hollow Sphere MCQ

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JEE — Field Inside Hollow SphereMediumQuestion 30769

Question

A small mass m is placed at the centre of a large hollow spherical shell (mass M). Force on m due to the shell is:
  1. A
    GMm/R²
  2. B
    Zero
    Correct
  3. C
    GMm/4R²
  4. D
    2GMm/R²

Correct answer

Zero

Explanation

By the shell theorem, the gravitational field everywhere inside a uniform shell is zero. So the force on m inside the shell is F = mg_inside = 0.

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