AP EAPCET 04-Jul-2022 Shift 2 Paper

(a) Inside a charged hollow metal sphere, electric field (E) is zero but electric potential (V) is not zero and equal to same potential as on its surface.
Work done to move a charge particle (either +ve or -ve) on a equipotential surface between any two points is always zero.
Since, W=q(V1−V2)
‌=q(V−V)‌‌(∵V1=V2=V)
‌=0
Potential energy of system of two like charges placed at a distance r is given as,
U=‌

1

4πε0

‌

q1q2

r

When both like charges q1 and q2 are brought closer, then r decreases, hence potential energy U increases.
Therefore, statements (A), (B) and (C), all are true.