Question

A particle of mass M is at a distance a from surface of a thin spherical shell of equal mass and having radius a.

• A. Gravitational field and potential both are zero at centre of the shell.
• B. Gravitational field is zero not only inside the shell but at a point outside the shell also.
• C. Inside the shell, gravitational field alone is zero.
• D. Neither gravitational field nor gravitational potential is zero inside the shell.

Answer 1

The correct option is D Neither gravitational field nor gravitational potential is zero inside the shell.

The gravitational field inside the shell is zero due to the shell. But due to mass M, on the circumference of the shell, Neither gravitational field nor gravitational potential is zero inside the shell.