Question
The diagrams below show regions of equipotentials.

A positive charge is moved from $$A$$ to $$B$$ in each diagram.
A.
Maximum work is required to move $$q$$ in figure (iii)
B.
In all the four cases, the work done is the same
C.
Minimum work is required to move $$q$$ in figure (i)
D.
Maximum work is required to move $$q$$ in figure (ii)
Answer :
In all the four cases, the work done is the same
Solution :
We know that,
$${\text{Work done}}\left( W \right) = q\Delta V$$
$$\Delta V$$ is same in all the cases. So, work done will be same in the all cases.