Assertion: The gravitational force on a particle inside a spherical shell is zero.
Reason: The shell shields other bodies outside it form exerting gravitational forces on a particle inside.

Options

A. If both the assertion and reason are true and reason is a true explantion of the assertion.
B. If both the assertion and reason are true but the reason is not true the correct explantion of the assertion.
C. If the assertion is true but reason false
D. If both the assertion and reason are false.

Answer

B

Explanation

The gravitational force on a particle inside a spherical shell is zero. However, unlike a metallic shell which sheilds electrical forces. The shell does not shield other bodies outside it form exerting gravitational forces on a particle inside.