Three rigid rods are joined to form an equilateral triangleABC of side 1m. Three particles carrying charges 20 ? C each are attached to the vertices of the triangle. The whole system is at rest always in an inertial frame.The resultant force on the charged particle at A has the magnitude.

Hello student,

Fnet=ma
a = acceleration of charge of particle at A = 0
So Fnet = 0.

Thanks and Regards

Shaik Aasif

askIITians faculty

All the three particles have same charge therefore they should repel each other.The charge at point A will experience repulsive force from point B and C.Similarly point B will experience force from A and C and point C will experience force from A and B . The resultant of the forces from point B to A and C to A will be cancelled out the resultant of force from A to C and A to B and therefore net force is zero

I hope this is helpful

Inbisat Yousuf Nath from Kashmir.