Question

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Mention the condition under which charges can move in a conductor . Name the device which is used to maintain this condition in an electric circuit .​

Answer 1

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Charge can move in a conductor only when a potential difference is maintained between it's ends .

A cell or a battery is used to maintain potential difference and hence , there is a flow of electric charges in an electric circuit .

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Answer 2

Charges can move, if there is a difference of electric pressure or potential difference along the conducor. Electric cell or a battery ( consisting of o e or more cells) is a device used to maintain the condition in an electric circuit