Question

Why electric potential is zero at any equatorial point

Answer 1

Answer:

As we know that electric potential is scalar quantity so potential due to both charges simply add up. But potential due to -ve charge is -ve and +ve charge is +ve . Hence potential due to both charges add up to give zero value at equatorial line. Q= charge, r=distance between charge and point...

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Answer 2

Answer:

The net potential will become zero at the bisector position due to the length of the dipole.

Explanation:

Consider there are two charges positive and negative. + q and - q  

Both are placed at a distance 2 l from the center position.

Now there is a point "P" on the bisector of the dipole. The point "P" is placed at distance r from the midpoint "O".

.Potential (P) = V1 + V2 = 0

.After calculations, the net potential will become zero at the bisector position due to the length of the dipole.