Problem set #7, EE 223, 3/11/2003 – 3/25/2003
Chapter 12, Problem 17.
The phase impedance Zp in the system shown in Fig.
12.31 consists of an impedance of 75 Ω in
parallel with a 25-µF capacitance. Let Van = 240
V at 60 Hz, and Rw = 2 Ω. Find (a) IaA; (b) Pwires; (c)
Pload; (d) the source power factor.
Chapter 12, Problem 18.
Each load in the circuit of Fig. 12.31 is composed of an inductive impedance 100 Ω in parallel with a
500-nF capacitor. The resistance labeled Rw = 1 Ω. Using positive phase sequence with Vab =240 V at f = 50
Hz, determine the rms line current, the total power delivered to the load, and the power lost in the wiring. Verify
your answers with an appropriate PSpice simulation.
Chapter 12, Problem 23.
The load in the balanced system of Fig. 12.32 draws a
total complex power of 3 + j1.8 kVA, while the source
generates 3.45 + j1.8 kVA. If Rw = 5 Ω, find (a) IaA ;
(b) IAB ; (c) Van .
Chapter 13, Problem 1.
The physical construction of three pairs
of coupled coils is shown in Fig. 13.33.
Show the two different possible locations
for the two dots on each pair of coils.
Chapter 13, Problem 2.
Let is1(t) = 4t A and is2(t) = 10t A in the circuit
shown in Fig. 13.34. Find (a) vAG; (b) vCG; (c) vBG .