Question
Question: Electric lines of force are as shown in the figure. Then potential at point P : 
A
Is zero
B
Is not zero
C
May be zero also
D
Is not defined
Answer
May be zero also
Explanation
Solution
The dotted lines may be surface boundary of a conductor. Electric lines of force do not enter a conductor. Potential of a conductor is constant but not necessarily zero.
It may be zero also. So, Point P may be inside a conductor (solid or hollow).