MAYALAB Manual Mechanical 0.8 to2 Kg Mild Steel Pith Ball Electroscope, For School, Collage

A plastic rod is charged by rubbing with cloth. The charged rod is brought close to the pith ball without touching it. It is observed that the charged rod weakly attracts the pith ball. This may be surprising – and you are right to be surprised, for the pith ball carries no charge.