Question

Why is potential is zero at two point wgen line joining two charges?

Answer 1

Answer:

Explanation:

electrical potential at a point as how much an imaginary positive charge hates to be there. The higher the potential, the more the imaginary charge wants to escape.

Now, in middle of two equal but opposite charges, an imaginary positive charge both does and doesn't want to be there (because of the negative and positive actual charges, respectively).

Since both charges are equal in magnitude, they fight to a tie. The imaginary charge neither likes nor dislikes the location; therefore, the potential is neither negative nor positive. That is, the electric potential is zero.

Answer 2

No, just  because the electric potential is zero at a particular point, it does not necessarily mean that the electric field is zero at that point. A good example is the case of a dipole, which  is two charges of the same magnitude, but opposite sign, separated by some distance. At  the midpoint between the charges, the electric potential due to the charges is zero, but the

electric field due to the charges at that same point is non-zero. Both the electric field

vectors will point in the direction of the negative charge.

(a) Zero. The potential at infinity is zero, and the potential at the midpoint of the

dipole, due to the charges on the dipole, is also zero. The potential difference is zero, so

no net work is done.

(b) Still zero. The path followed does not matter because the electric

force is conservative – all that matters is the potential difference between the initial point

and the final point, which is zero.