The diagrams below show region of equipotentials.

Options

A. Maximum work is required to move `q` in figurec (c ).
B. In all the four cases, the work doen is the same.
C. Minimum work is required to move `q` in figurec (a).
D. Maximum work is required to move `q` in figurec (b ).

Answer

B

Explanation

In Fig, when positive charge is moved from `A` to `B` it has to go from `V_(1) = 10`volt to `V_(2) = 30 V`, in all the four cases.Work done is same as it is independent of the path.
`W = q (V_(2) - V_(1)) = `same in all the four cases.