Question

Why do the two foil strips open out when we touch the end of metal cap with a charged
pen? electroscope
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Answer 1

answer:

because when a charged pen is touched with metal cap then that charge goes to rod and foil strips open.this happens because we know that the positively charged body attracts the negatively charged body and same charges repel each other

Answer 2

The two foil strips open out when touched with the end of a charged metal cap because;

• The metal cap is a conductive material.
• When a charged pen is bought in contact with the metal cap, charging by conduction occurs.
• Charges flow from the charged pen to the uncharged metal cap.
• The two foil strips in contact with the metal cap receive the same charges from the charged pen.
• Since the two foils strips gain similar charges, they open out.
• This proves that like charges repel each other.