CBSE Class 12-science Answered
you can charge the body by two ways
1- by conduction
2- by induction.
by induction process you touch any uncharged body with negatively charged body, due to additive property of the charges, the uncharged body will get negatively charged.
second process is the most intersting one, here one can charge the uncharged by, without touching it. you take the positvely charged rod near to the huge given ball, the charges of the huge given ball gets polarised, negative charges get accumulated at the surface near to the positive charged rod and positive charges get accumelated at the other end of the sphere. Now get connect the positive end of the sphere with the ground, finally sphere is left with the negative charges, now remove the rod from the sphere, the negativel charges get distributed equally in all directions, so we get the negative charged heavy sphere now.