Two uncharged metal balls, Y and X, each stand on a glass rod and are touching. A third ball carrying a negative charge, is brought near the first two While the positions of these balls are fixed, ball Y is connected to ground. Then the ground wire is disconnected. While Y and X remain in touch, the ball carring the negative charge is removed. Then ball Y and X are separated.

At the time When the third ball should carry a positive charge is brought near the first two, it gets polarized X contains –ve charge and Y contain a +ve charge. After this Y is connected to the ground and the electron move up from the ground after that ground wire should be disconnected due to this electron has canceled the net +ve charge on Y.

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