In: Physics
A hair dryer, rated at 1875 watts, operates on a 120V voltage source.
What is its resistance? in Ohms
How much current does it use? in A
Voltage source the hair dryer operates on = V = 120 V
Power the hair dryer is rated at = P = 1875 W
Resistance of the hair dryer = R
R = 7.68
Current used by the hair dryer = I
V = IR
120 = I(7.68)
I = 15.6 A
a) Resistance of the hair dryer = 7.68
b) Current used by the hair dryer = 15.6 A