Question

Three small spheres each carrying a positive charge q are placed on the circumference of a circle of radius r to form an equilateral triangle. The electric field at the centre of the circle is

Answer 1

The resultant of three equal forces inclined to each other at 120∘120∘ is zero. Because : F2+F2+2Fcos120∘=F2F2+F2+2Fcos120∘=F2. That is the resultant of any two of them is equal and opposite to the third force.

Answer 2

Answer:

Explanation: intensity of an electric field inside the spear is zero because of charges only placed at circumference of the spear so electric field intensity is equals to force per unit charge here charge is zero so answer is equals to zero