Positive and negative charges of equal magnitude lie along the symmetry axis of a cylinder. The distance from the positive charge to the left - end cap of the cylinder is the same as the distance from the negative charge to the right - end cap.

What is the sign of the flux through the right - end cap of the cylinder ?

Answer

A

Explanation

Electric field at right end cap due to both the charges is toward right and area vector is also toward right. Hence , flux is positive.