Three small spheres each carrying a positive charge Q are placed on the circumference of a circle of radius to form an equilateral triangle. The electric field intensity at the centre of the circle will be.

Given data: on the edge of a circle of radius, three tiny spheres with positive charges are arranged to make an equilateral triangle.

Concept used: Electric field

Detailed solution:

The electric field at the centre by

$E=\frac{kq}{r^2}$

The three electric fields are $120°$ apart and have equal magnitudes.

The net Electric field at center is zero.