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Voltmeter reads the potential difference across the terminals of an old battery as 1 40...

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Voltmeter reads the potential difference across the terminals of an old battery as 1 40 V while a potentiometer reads its voltage to be 1 55 V The voltmeter resistance is 28002 Then select the correct option s A the emf of the battery is 1 4 V B the emf of the battery is 1 55 V C the internal resistance r of the battery is 300 D the internal resistance r of the battery is 502

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