First slide

Potential energy

Question

The diagrams below show regions of equipotentials :
A positive charge is moved from A to B in each diagram :

Easy

A

In all the four cases the work done is the same
B

Minimum work is required to move q in figure (i)
C

Maximum work is required to move q in figure (ii)
D

Maximum work is required to move q in figure (iii)

Solution

$W = q ∆ V$
as $∆ V$ is same in all conditions, work will be same.

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