A coil has resistance R=5 Ohms and inductance L=5 milliHenries and is powered by

Question

A coil has resistance R=5 Ohms and inductance L=5 milliHenries and is powered by a generator with variable frequency and maximum voltage V = 10 Volts. (b) What is the average power used by the coil when the generator operates at the frequency you found in (a)? For (a) I got the frequency of 159.2 Hz (c) What is the average power used by the coil when the generator operates at 60Hz? (d) What is the average power used by the coil when the generator operates at one-thousand times the frequency in (a)?

Explanation / Answer

f =159.2 Hz

= f/6.28 = 25.35 rad/s

R = 5 ; L= 5*10^-3 H

L = 0.126

Z = 5.0016

I = 1.99 A

avg power = 19.99/2 W = 9.995 W

c) = 60/6.28 = 9.55 rad/s

L = 0.048      R = 5

Z =5

I =

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