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Two spherical shells have masses $m$ and $2 m$ as shown. Choose the correct options.

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Between $A$ and $B$ gravitational potential is constant

Between $A$ and $B$ gravitational field strength is zero

There will be two points one lying between $B$ and $C$ and other lying between $C$ and infinity where gravitational field strength are same

There will be a point between $B$ and $C$ where gravitational potential is zero.

answer is A, B, C.

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Detailed Solution

Inside a shell, $V =$ constant and $E = 0$

Between $A$ and $B$ , $E_{net} = 0,$ $V_{net} =$ constant because these points are inside both shells.

Between $B$ and $C$

$E$ of $m \neq 0, E$ of $2 m = 0$

$V$ of $m \neq$ constant, $V$ of $2 m =$ constant.

Beyond $C$

$E$ and $V$ due to both shells are neither zero nor constant.

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