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

power=voltage x current

Answer 2

30=120*x
30=120x
30/120=120/120x
0.25 = x
so it is A