ECE 209 HOMEWORK PROBLEMS #6 © Dr. James S. Kang, Cal Poly Pomona 1. Given the following voltage and current on the load, find the average power, reactive power, and power factor.
2 (a) v( t ) = 120 cos 2 60t + , i( t ) = 5 cos 2 60t + 3 3 2 (b) v( t ) = 120 cos 2 60t - , i( t ) = 3 cos 2 60t - 3 3 (c) v( t ) = 5 cos 2 10 8 t + , i( t ) = 2 cos 2 10 8 t + mA 3 6 2 9 (d) v( t ) = 2 cos 2 10 9 t + , i( t ) = 3 cos 2 10 t + mA 3 4 3 10 (e) v( t ) = 0.2 cos 2 1010 t + , i( t ) = 5 cos 2 10 t - mA 4 4 2. Find the rms value of the following periodic signals with period T. A, 0 t < T 2 (a) x( t ) = T 0 , t