q6_key

q6_key - PHY-2054C-002, Fall 2008 Instructor: Dr....

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Unformatted text preview: PHY-2054C-002, Fall 2008 Instructor: Dr. Bhattacharya Quiz #6 KEY, Thursday, Oct 16 1. In a series R-L-C circuit, R = 300 , XC = 200 and XL = 600. The average power consumed in the resistor is 60.0 W. (a) Find the angle by which the current leads(lags) the voltage. = tan-1 XL - Xc R = tan-1 600 - 200 300 = 530 (b) What is the power factor of the circuit ? Power factor cos = cos 530 = 0.6 (c) What is the rms voltage of the source ? P = Irms Vrms cos = Z= 2 Vrms cos Z 3002 + (600 - 200)2 = 500 PZ = cos 60 500 = 223.6 V 0.6 Vrms = ...
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