An electric hair dryer has a power rating of 1000 W. How much current will it draw when connected to 120 V?
The quantity to be found is amperage, or current. The known quantities are power and voltage. To solve this problem, choose the formula shown in Figure 2–20.
I = \textstyle {\frac{\mathbf{p}}{E}}
I = \textstyle {\frac{\mathbf{1000\ W}}{120\ V}}
I = 8.333 A