Which of the following cannot be charged easily by friction?

a) A plastic scale b) A woollen cloth c) An inflated balloon d) A copper rod

(D) A copper rod Only non-conducting materials can be easily charged by friction. Copper is a highly conducting materials. Therefore, a copper rod cannot be charged easily by friction.

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i think it is d)a copper rod or may be b)A woolen cloth

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It Should Be d) Copper Rod As It Is A Good Conductor Of Electricity

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