Question

The equal charges +q are placed at the three vertices of an equilateral triangle of side lenth l. If a 4th charge +Q is kept at the
centroid of the triangle, what amount of force will be experience by
Q and in which direction?​

Answer 1

Answer:

0 N

Explanation:

The centroid of an equilateral triangle is equidistant from all the vertices.

Further, each line joining the centroid with the vertices makes an angle of 120 degree with the other two lines.

⇒ The coulomb forces on the charge placed at the centroid due to the charges at the vertices cancel each other.

⇒ The net force on the charge placed at the centroid due to the charges at the vertices is zero..

Thank you.