ELECTRICITY FOR TRADES
3rd Edition
ISBN: 9780078118630
Author: Petruzella
Publisher: RENT MCG
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Chapter 3.2, Problem 5RQ
To determine
Explain the reason why polarity is normally identified on DC but not AC voltage sources.
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4) Find the phasor voltage Vs for the following circuit if loads L1 and L2 are absorbing 15 kVA at 0.6 pf
lagging and 6 kVA at 0.8 pf leading, respectively. Express Vs in polar form.
+
j10
+
200/0° V(rms) | L1
Li
L2
3) A 100-V rms, 60 Hz source is applied to a load impedance Z. The apparent power entering the load is
120 VA at a power factor of 0.707 lagging.
a) Calculate the complex power
b) Find the rms current supplied to the load
c) Determine Z
d) Assuming that Z = R + jwL, find the values of R and L.
1) Find the average power delivered by the ideal current source in the following circuit if ig =
30 cos(25000t) mA.
202
w
50
w
40 με
40 pH
Chapter 3 Solutions
ELECTRICITY FOR TRADES
Ch. 3.1 - Define static electricity.Ch. 3.1 - Prob. 2RQCh. 3.1 - Prob. 3RQCh. 3.1 - Prob. 4RQCh. 3.1 - Define electrostatic discharge.Ch. 3.1 - Prob. 6RQCh. 3.1 - Name three ways for a neutral object to become...Ch. 3.1 - Charging by _______________ involves an...Ch. 3.1 - Prob. 9RQCh. 3.1 - Prob. 10RQ
Ch. 3.1 - Prob. 11RQCh. 3.2 - Prob. 1RQCh. 3.2 - What is the external force that causes electron...Ch. 3.2 - Prob. 3RQCh. 3.2 - Prob. 4RQCh. 3.2 - Prob. 5RQCh. 3.2 - Prob. 6RQCh. 3.2 - Compare the operation of grid-tie and off-grid PV...Ch. 3.2 - Prob. 8RQCh. 3.2 - Name the three basic components of a battery.Ch. 3.2 - Prob. 10RQCh. 3.2 - Prob. 11RQCh. 3.2 - How does an electric generator produce...Ch. 3.2 - What type of prime mover is used as part of wind...
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