4. You buy a car with a V 12V deep cycle battery that can hold a charge of Q -55

Question

4. You buy a car with a V 12V deep cycle battery that can hold a charge of Q -55Ah. Unfortunately you notice too late that the car's alternator is busted and your battery ends up to be completely depleted. Luckily your neighbor has a battery charger that can deliver a sustained charging current of 1 = 2A at V = 12V. How long does it take to recharge the battery using this charger? Neglect any inner resistances of the battery and charger, and any resistances of the wiring. Hint: what physical property would help you to distinguish the "potency" of different chargers? What makes one charger better than another?

Explanation / Answer

4) Q = 55 A*h

= 55*60*60

= 198000 C

time taken store the same amount of charge, t = Q/I

= 198000/2

= 99000 s

= 99000/(60*60)

= 27.5 hours <<<<<<<<<----------------------Answer

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