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Question:

The diagrams below show regions of equipotentials. A positive charge is moved from A to B in each diagram. Maximum work is required to move the charge in figure (b). Maximum work is required to move the charge in figure (c). In all the cases the work done is the same. Minimum work is required to move the charge in figure (a).

In all the cases the work done is the same.

Maximum work is required to move the charge in figure (b)

Maximum work is required to move the charge in figure (c)

Minimum work is required to move the charge in figure (a)

Solution:

The correct option is C. In all the cases the work done is the same. Work done = Change in potential energy. So in all cases, from moving A to B, the change in potential is the same. Hence work done will be the same.