Three charged particles are collinear and are in equilibrium, then

Options

A. all the charged particles have the same polartiy
B. the equilibrium is unstable
C. all the charged particles cannot have the same polarity
D. Both (b) and (c ) are correct

Answer

d

Explanation

If a charge particle is in equilibrium under electrostatic force, then that particle never be in stable equilibrium. Hence option (b) is correct.
Since, all charges are in equilibrium so, net force an any one of charges are in equilibrium so, net force on any one of charges should be zero-for this two equal and opposite force will act on any charges.
Hence option (c ) is also correct.