In an electroscope, the foil strips that move apart on detecting a charged body would come back to their initial position after some time. Identify the reason.

Electrostatic attraction

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Bending of foil strips

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Electric discharge

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Electrostatic repulsion

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Solution

The correct option is C
Electric discharge

The strips carrying similar charges repel each other when given charge by an external body. Hence, they move apart in the electroscope. After some time, due to the electric discharge of the foil strips, they stop repelling each other. Hence, the strips come back to their initial position.

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