A battery of internal resistance r 02 and emf e 120 v if, Ask an Expert

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A battery of internal resistance r = 0.2 and emf E = 12.0 V. If the battery is connected to a device of resistance 6.0 (ohms) , what is the potential difference across the battery ? What is the current through the device ? What is the electric power output of the battery ?

If the battery is charged by an external source with a charging current of 1.2 A. What is the potential difference across the battery ? What is the electric power input provided by the external source?

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