Question

A clock radio is rated as 30 W of power output. If the radio also draws 30 W at 120 V, which will the current draw be?

A. 0.25 A
B. 4 A
C. 3,600 A
D. 0.5 A

Answer 1

Given:
power = 30 W
voltage = 120 V

Power = current * voltage
current = power / voltage

Current = 30 w / 120 v
Current = 1/4 or 0.25 A

The answer is Choice A. 0.25 A.