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MCAT Question A Day - 8/23/13 - Answer!

The current through a conductor is 3.0 A when it is attached across a potential of 6.0 V. How much power is used?

A.  0.50 W
B.  2.0 W
C.  9.0 W
D.  18 W

The correct answer is (D). Power = VI = 18 W