Two small spherical balls each carrying a charge Q = 10 μC( 10 micro = coulomb) are suspended by two insulating threads of equal lengths 1 cm each, from a point fixed in the ceiling. It is found that in equilibrium threads are sepreated by an angle 60∘ between them, as shown in figure. What is the tension in the threads (Given 14πε0 = 9× 10^9 N m /C 2 )

