Two point charges `3muC and -3muC` are placed respectively, at points A and B, 2cm apart
Mention the location of equipotential surface of the system.

Explanation

Equipotential surface means the surface, where potential remains same at each point.
Here, this is the system of two equal and opposite charges

`:.` The potential at C (mid - point of AB),
`V=(1)/(4piepsilon_(0))((q_(1))/(r_(1))+(q_(2))/(r_(2)))`
`=(1)/(4piepsilon_(0))[(2xx10^(-6))/(2.5xx10^(-2))+((-2xx10^(-6)))/(2.5xx10^(-2))]=0`
Thus potential is zero at each point on the line which passes through the mid - point of AB and perpendicular to it. So, a plane passing through the mid - point C of AB is an equipotential surface.