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A car battery with a 12 V emf and an internal resistance of 0.040 is being charged with a current of 50 A.

A car battery with a 12 V emf and an internal resistance of 0.040 is being charged with a current of 50 A.
(a) What is the potential difference V across its terminals

(b) What is the rate Pr of energy dissipation inside the battery?
(c) At what rate is electrical energy being converted to chemical energy?
(d) When the battery is used to supply 50 A to the starter motor, what is V?

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