Question

Figure shows line of constant potential in a region in which an electric field is present. The values of the potential are written in brackets. Of the points $A,B$ and $C$, the magnitude of the electric field is greatest at the point______.

Answer 1

The potential difference between any two connective line

$dV=V_1-V_2=10=Constant$

Hence E will be maximum where the distance between the lines is minimum.

i.e. at B where lines are closest.