Four 1.5-volt AA batteries in series power a transistor radio. If the batteries hold a total charge of 440 C, how long will they last if the radio has a resistance of 200 $\Omega$?
A) 4.1 h
B) 2.2 h
C) 1.1 h
D) 13 h

Question

Quizplus · Accepted Answer

The total voltage is 6V (1.5V x 4). Using Ohm's Law (V = IR), the current I = V/R = 6V/200Ω = 0.03A. The time t = charge/current = 440C/0.03A = 14666.67 seconds, which is approximately 4.1 hours.

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