Current Electricity

Related Questions

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• A battery is charged at a potential of 15 V for 8 hours when the current flowing is 10 A. The battery on discharge supplies a current of 5 A for 15 hours. The mean terminal voltage during discharge is 14 V. The Watt-hour efficiency of the battery is

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• A certain wire has a resistance $R$. The resistance of another wire identical with the first except having twice its diameter is

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