Alkaline batteries have the advantage of putting out constant voltage until very nearly the end of their life. How long will an alkaline battery rated at 1.00 A*h and 1.58 V keep a 1.00-W flashlight bulb burning?

Question

Cory Herman

Physics

25 July, 15:45

Alkaline batteries have the advantage of putting out constant voltage until very nearly the end of their life. How long will an alkaline battery rated at 1.00 A*h and 1.58 V keep a 1.00-W flashlight bulb burning?

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Answers (1)

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Shelby Sparks · Answer 1

Voltage, V = 1.58 V

Power, P = 1 W

1 A. h

Charge, Q = 1 A. h = 1 x 3600 A. s = 3600 C

Power x time = Voltage x charge

1 x t = 1.58 x 3600

t = 1.58 x 3600 second

t = 1.58 hours