AC circuits power

Discussion in 'Homework Help' started by xx123321, May 6, 2011.

1. xx123321 Thread Starter New Member

Apr 27, 2011
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1-I have calculated Qr=0 VAR, Qc=28.8VAR, Ql=36VAR (am i right?)

2-How to find the apparent power for each element?

3-I have sketched the power triangle like the following shape,am i right?

2. t_n_k AAC Fanatic!

Mar 6, 2009
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782
Your reactive power values are correct. Normally to get apparent powers you use the power triangle. It's hopefully reasonably obvious (after a little thought) that, in the case of each parallel branch element, either the real or reactive power is zero - so the apparent power reduces to a trivial value in each case.

3. xx123321 Thread Starter New Member

Apr 27, 2011
15
0
for the apparent power,using the power triangle,i calculated Sr=√(72^2+0^2)=72VA, Sc=√(0^+28.8^2)=28.8VA, Sl=√(0^2+36^2)=36VA, am i right?

4. t_n_k AAC Fanatic!

Mar 6, 2009
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That's right.

xx123321 likes this.
5. Amila Pasan New Member

Jun 5, 2015
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If we were asked the power factor of the overall circuit what would it be?

6. WBahn Moderator

Mar 31, 2012
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4,806
As this is directly related to the TS's topic, I won't split it off as a hijack.

There is no need to put forth the effort to make your text look like a rainbow, particularly when it makes it difficult to read and is annoying to most readers, particularly engineers and other techies who, as a rule, strongly favor function over form.

As this is Homework Help, you need to put forth some effort to solve the problem you are asking.