(a) Two identical sphereshaving positive charges are placed `3 m` apart repel each other with a force `8 xx 10^(-3) N`. Now charges are connected by a metallic wire, they begin to repel each other with a force of `9 xx 10^(-3) N`. Find initial charges on the spheres.
(b) Two identical spheres having charges of opposite signare placed `3 m` apart attract other with a force `2.4 xx 10^(-3) N`. Now spheres are touched and then placed at original separation repel with a force `10^(-3) N`. Find initial charges on the spheres.