Two spherical shells have mass m and 2m as shown. Choose the incorrect option.
Answer & explanation
Correct answer: option 4
As there is no mass inside B, So, field between A to B is zero, i,e,. potential between A to B is constant.
\(\frac{Gm}{x^2} = \frac{G(3m)}{y^2}\)
Potential between B and C is not zero at any point.