Four charges $ + Q,\, - Q,\, + Q,\, - Q$ are placed at the corners of a square taken in order. At the centre of the square
$E = 0,\,V = 0$
$E = 0,\,V \ne 0$
$E \ne 0,\,V = 0$
$E = 0,\,V \ne 0$
Three charged concentric nonconducting shells are given as shown in figure. Find the potential at point $A$
Consider a finite insulated, uncharged conductor placed near a finite positively charged conductor. The uncharged body must have a potential
Assertion : For a non-uniformly charged thin circular ring with net charge is zero, the electric field at any point on axis of the ring is zero.
Reason : For a non-uniformly charged thin circular ring with net charge zero, the electric potential at each point on axis of the ring is zero.
A hollow metallic sphere of radius $10 \;cm$ is charged such that potential of its surface is $80\; V$. The potential at the centre of the sphere would be
Point charge ${q_1} = 2\,\mu C$ and ${q_2} = - 1\,\mu C$ are kept at points $x = 0$ and $x = 6$ respectively. Electrical potential will be zero at points