A 0.5H inductor has an INTERNAL resistance of 150ohms. The current flowing through the inductor is 0.4A...
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A 0.5H inductor has an INTERNAL resistance of 150ohms. The current flowing through the inductor is 0.4A...

[From: ] [author: ] [Date: 12-08-27] [Hit: ]
!!-model the circuit as an ideal resistor and an ideal inductor in series.convert the current to an rms value using i,rms = i/squareroot(2).then use p = i^2 * R using the RMS current and the resistance of 150 ohms.......
at a frequency of 60Hz. What is the real/ture power consumed by this non ideal inductor?

a. 12W
b. 24W
c. 36W
d. 48W
e. 0W because inductors never consume any power.

THANK YOU FOR YOU HELP!!!

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model the circuit as an ideal resistor and an ideal inductor in series. convert the current to an rms value using i,rms = i/squareroot(2). then use p = i^2 * R using the RMS current and the resistance of 150 ohms. basically, we are interested in the average power, so we use the RMS value of the current.
the power dissipated through the ideal inductor in our resistor inductor model is irrelevant, as it is all imaginary(reactive) and we are asked for true power.

run through the calculation and you will get the correct answer. *cough* (a) *cough*

and to help you, here is a popular free circuit simulator that will allow you to check your answers with a bit of effort. click the download for LTSpice IV. It's a good SPICE simulation program that actually gets used in industry.

http://www.linear.com/designtools/softwa…
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