Rechargeable Flashlights
Rechargeable Flashlights
Charge and Voltage Help-10 points Best Answer?
A Rechargeable Flashlight battery is capable of delivering 85 mA for about 12 h. How much charge can it release at that rate? If its terminal voltage is 1.2 V, how much energy can the battery deliver.
Thanks for any help.
Current is equal to the amount of charge flow per unit time.
That is, Current in units of amps = Coulombs/sec
I = Q/t
Therefore;
Q = It = 0.085(12)(3600) = 3672 C
Energy: W = 1/2 qV = 1/2 (3762)(1.2) = 2257.2 J
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