AC Circuits question verification

  • Thread starter Yarnzorrr
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  • #1
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Main Question or Discussion Point

Hi there,

in this youtube tutorial about AC circuits

http://www.youtube.com/watch?v=JiLdrAHBBRc&feature=plcp

at about 4:08 It's supposed to be z=√(R^2+(XL-Xc)^2)) but in the example she does Xc-XL, is there a reason for this or is it a mistake in her working??
 

Answers and Replies

  • #2
1,754
52
Xl - Xc is correct. In her example she has (Xc - Xl)^2. When she squares the difference, the result is the same.
 
  • #3
210
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The equation should be written
Z = √(R^2 +(XL ~XC)^2)
because it is the difference between XL and XC that is important. It does not matter which is greater.
 
  • #4
1,754
52
In this equation that's true but generally Xl is regarded as positive and Xc as negative.
 

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