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Physics II homework. Can somebody help me?

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A given AC circuit has a frequency of 60Hz an effective voltage of 120v and a 8uF capacitor. What is the maximum current in the circuit?

Answers 0.271A, 0.512A, 0.575A

Apr 23rd, 2015

Capacitive Reactance, Xc = 1/ 2pifC

= 1/ (2pi(60)(.000008)) = 331.57 ohms

I = V/Xc = 120/331.57 = 0.362 A

Apr 23rd, 2015

A certain AC circuit carries an rms (effective) current of 2.80 amps?

Answers: 2.68A 2.18A 1.68A

Apr 23rd, 2015

Excuse me, for the first question, I calculated the RMS value of the current.

I think you wanted the peak value, which is sqrt(2)RMS = 0.512 A


Apr 23rd, 2015

Your second question is incomplete.

Apr 23rd, 2015

2 light bulbs are wired in parallel across a 120 volt Ac electrical source. One is a 150- w bulb and the other is a 100w bulb. What is the rms (effective) current within the 150w bulb?

Answers 1.03A 0.63A 0.83A

Apr 23rd, 2015

Last one. The phase angle of electrical circuit is zero degrees. If the capacitive reactance is 60 ohms, what is the inductive reactance?

Answers 90 degrees , 60 degrees, cant be determined

Apr 23rd, 2015

I'm helping someone else right now. I'll get to those 2 in a little while. Thanks.

Apr 23rd, 2015

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Apr 23rd, 2015
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Apr 23rd, 2015
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