Question Part Points Submissions Used A battery delivering a current of 55.0 A t

Question

Question Part Points Submissions Used A battery delivering a current of 55.0 A to a circuit has a terminal voltage of 21.0 V. The electric power being dissipated by the internal resistance of the battery is 37.9 W. Find the emf of the battery.
emf = ---Select---VJWC Question Part Points Submissions Used Question Part Points Submissions Used Question Part Points Submissions Used Question Part Points Submissions Used Question Part Points Submissions Used A battery delivering a current of 55.0 A to a circuit has a terminal voltage of 21.0 V. The electric power being dissipated by the internal resistance of the battery is 37.9 W. Find the emf of the battery.
emf = ---Select---VJWC A battery delivering a current of 55.0 A to a circuit has a terminal voltage of 21.0 V. The electric power being dissipated by the internal resistance of the battery is 37.9 W. Find the emf of the battery.
emf = ---Select---VJWC Question Part Points Submissions Used

Explanation / Answer

power dissipated by internal resistance=37.9 W implies internal resistance=37.9/55*55=0.0125 ohm

emf of battery=21+55*0.0125=21.689 V

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