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In the circuit shown the ammeter 'A' rea...

In the circuit shown the ammeter 'A' reads `2A`. `XY` is a circuit which can either be a resistance of a battery. In the direction of the current there will always be a potential drop across the resistance. Reagarding battery you have to remember that the potential difference across its terminals can be more than its emf or less depending upon whether the battery is delivering the current, or is being charged in the circuit

Assuming `XY` to be a resistor, its value is:

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In the circuit shown the ammeter 'A' reads 2A . XY is a circuit which can either be a resistance of a battery. In the direction of the current there will always be a potential drop across the resistance. Reagarding battery you have to remember that the potential difference across its terminals can be more than its emf or less depending upon whether the battery is delivering the current, or is being charged in the circuit Assuming XY to be a battery with 2 Omega internal resistance which is being charged, its emf is:

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