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posted by  Marshy on 11/5/2009 12:09:36 AM  |  status: Closed  |  Earned Karma: 25

Generator

Course Textbook Chapter Problem Needs by
Algebra Based Physics Physics (3rd) by Walker N/A N/A 11/5/2009 at 6:00:00 AM
Question Details:
If 35.0 MW of power at 43.2 kV (rms) arrives at a town from a generator via 3.10 Ω transmission lines.
a. Calculate the emf at the generator end of the lines. (2 points)
b. Calculate the fraction of the power generated thatis lost in the lines.
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posted by Kevin_08 on 11/5/2009 1:24:01 AM  |  status: Live
Asker's Rating: Lifesaver   
Response Details:
 Given that
 Power P = 35.0 *106 W
 RMS voltage Vrms = 43.2*103 V

 
  a)  Current is
              I = P/V
                 = (35.0 *106 W)/(43.2*103 V)
  The emf at the generator end of the line is
                  ε = I R
       Here R = 3.10 ohms
   The power in the transmission lines is P' = V2/R
 b)  The fraction of the power generated that is lost in the lines is
                  f = (P- P')/P'

  Substitute the values.
I hope this helps! Best of luck with the rest of your coursework.
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