Problem Set #3
1. For the following circuit, solve for the average power (P), reactive power (Q) and the
complex power (
S
) delivered or absorbed by each element in the circuit.
2. For the following circuit, convert the circuit to the frequency domain and convert the
sources to rms units.
Solve for the average power (P), reactive power (Q) and the
complex power (
S
) delivered or absorbed by each element in the circuit.
3. A single load is connected to a source.
The load consumes 44kW at a power factor of
.5 lagging.
The source operates at 60 Hz with a voltage of 220 volts rms.
a) Find the impedance of the load and the source current.
b) It is desired to raise the power factor to 0.988 lagging.
Design a load, Z
C
that
achieves this new power factor without changing the source voltage magnitude or
the real/average power delivered by the source.
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View Full Document4. A voltage source, with a rms voltage magnitude of 208 serves the following loads,
which are all connected in parallel:
Load 1 – 18kW at PF=.5 lagging
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 Fall '09
 ENGLISH
 Alternating Current, Frequency, Volt, Power factor

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