Question

A neutral electroscope is touched with a negatively charged rod. What is the charge on the electroscope after the rod is removed? *​

Answer 1

Answer:

• When a negatively charged object is brought near the knob of a neutral electroscope, the negative charge repels the electrons in the knob, and those electrons move down the stem into the leaves. Excess electrons flow from the rod into the ball, and then downwards making both leaves negatively charged.
• As the rubber rod is brought near, electrons are pushed down into the electroscope, negatively charging the conducting rod and foil, leaving the top part positively charged. Note that the net charge of the electroscope is still zero.