A 1.5-V battery is connected to a circuit and puts out a current of 0.45 A.How much power is the battery putting out?
A)0.30 W
B)0.68 W
C)3.3 W
D)5.0 W
E)7.4 W

Question

Quizplus · Accepted Answer

The power output of the battery can be calculated using the formula: Power = Voltage x Current. 
Plugging in the values given, we get: 
Power = 1.5 V x 0.45 A = 0.675 W
Rounding to two significant figures, we get the answer of 0.68 W. 
Therefore, the correct answer is B.

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