- #1
vizakenjack
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Homework Statement
An electric fan which is plugged into a 115 V(rms), 60 Hz socket in your house can be considered as made up of a 1500 Ω resistor in series with a 1.4 H inductance. How much power is dissipated by this electric fan on the average? (in W)
Homework Equations
P = IV = I^2 R
I = V/Z(impedance) or I = V/R
The Attempt at a Solution
Find Z, then I, then P.
My question is, however, why couldn't I use I = V/R?? The other formula to find current? Why wasn't it valid here? Because V/R is for capacitors... or? Can someone explain.