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Complex Electric Circuits

A battery of ...

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A battery of 20 cells is charged by 220V with a charging current of 15A. If the emf of each cell is 2V and internal resistance is 0.1ohm,then the series resistance required to be placed in the circuit will be

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The internal resistance of a cell of emf 2 V is 0.1 ohm. It is connected to a resistance of 3.9 ohm. The voltage across cell will be (in volts)

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