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Question

Which of the following cannot be charged by rubbing it with neutral bodies?



Your Answer
A

A plastic scale

Correct Answer
B

A copper rod

Your Answer
C

An inflated balloon

Your Answer
D

A woollen cloth


Solution

The correct option is D

A copper rod


Only non-conducting materials can be charged by rubbing with neutral bodies. Conductors are materials that allow electrons to flow through them easily. They cannot be easily charged by friction as the extra electrons gained can easily escape. Copper is a highly conducting materials. Therefore, a copper rod cannot be charged by rubbing it with neutral body.

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