Problem set #5, EE 223, 2/13/2003 – 2/18/2003
Chapter 11, Problem 15.
For the network of Fig. 11.32:
(a) what impedance ZL should be connected
between a and b so that a maximum average power
will be absorbed by it?
(b) What is this maximum average power?
Chapter 11, Problem 32.
(a) Find the power factor at which the source in the
circuit of Fig. 11.42 is operating.
(b) Find the average power being supplied by the
source.
(c) What size capacitor should be placed in parallel
with the source to cause its power factor to be unity?
(d) Verify your answers with PSpice.
Chapter 11, Problem 44.
A capacitive impedance, ZC = -j120 Ω, is in parallel with a load ZL . The parallel combination is supplied by a
source, Vs = V rms, that generates a complex power of 1.6 + j0.5 kVA. Find the (a) complex power
delivered to ZL; (b) PF of ZL; (c) PF of the source.