EBK ELECTRIC CIRCUITS
10th Edition
ISBN: 8220100801792
Author: Riedel
Publisher: YUZU
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Chapter 5, Problem 50P
a.
To determine
Show that the output voltage of the op amp
b.
To determine
Calculate the value of output voltage
c.
To determine
Calculate the actual value of output voltage
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20
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P-50HZ
25
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Block 3-2
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2. A 3-phase, 75 MVA, 11-8 kV star-connected alternator with a solidly earthed neutral point has the fol-
lowing p.u. impedances based on rated phase voltage and rated phase current :
Positive phase sequence impedance
Negative phase sequence impedance
Zero phase sequence impedance
=
j 2 p.u.
=
j 0.16 p.u.
=
j 0.08 p.u.
Determine the steady-state fault current for the following: (i) 3-phase symmetrical short-circuit (ii) one
line-to-earth fault (iii) two line-to-earth fault. The generated e.m.f. per phase is equal to the rated voltage.
[(i)1840 A (ii) 4920 A (iii) 3580 A]
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Q1. With the help of a well-drawn diagram, explain concept map of an electromechanical
system modelling.
[20]
Q2. Separately-excited generator develops a no load emf of 150V at an armature spend of 20
rev/s and a flux per pole of 0.1 Wb. determine the generated emf when
a. The spend increases to 25rev/s and the pole flux remains unchanged.
b. The speed remains at 20 rev/s and the pole flux is decreased to 0.08Wb.
c. The speed increases to 24 rev/s and the pole flux is decreased to 0.07 Wb
Write short notes on the following term
a. Copper loss
b. Iron loss
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[20]
Chapter 5 Solutions
EBK ELECTRIC CIRCUITS
Ch. 5.2 - Assume that the op amp in the circuit shown is...Ch. 5.3 - The source voltage vs in the circuit in Assessment...Ch. 5.4 - Find vo in the circuit shown if va = 0.1 V and vb...Ch. 5.5 - Assume that the op amp in the circuit shown is...Ch. 5.6 - In the difference amplifier shown, vb = 4.0 V....Ch. 5.7 - The inverting amplifier in the circuit shown has...Ch. 5 - Prob. 1PCh. 5 - Replace the 2 V source in the circuit in Fig. P5.1...Ch. 5 - Find iL (in milliamperes) in the circuit in Fig....Ch. 5 - The op amp in the circuit in Fig. P5.4 is...
Ch. 5 - Find io in the circuit in Fig. P5.3 if the op amp...Ch. 5 - The op amp in the circuit in Fig. P5.5 is ideal....Ch. 5 - Prob. 7PCh. 5 - Design an inverting amplifier with a gain of 4....Ch. 5 - Design an inverting amplifier with a gain of 2.5,...Ch. 5 - The op amp in the circuit shown in Fig. P5.11 is...Ch. 5 - The op amp in the circuit in Fig. P5.10 is...Ch. 5 - The op amp in Fig. P5.12 is ideal.
What circuit...Ch. 5 - Refer to the circuit in Fig. 5.12, where the op...Ch. 5 - The op amp in Fig. P5.14 is ideal. Find vo if va =...Ch. 5 - Prob. 15PCh. 5 - Design an inverting-summing amplifier using a 120...Ch. 5 - Design an inverting-summing amplifier so...Ch. 5 - Prob. 18PCh. 5 - The op amp in the circuit of Fig. P5.18 is...Ch. 5 - Prob. 20PCh. 5 - Prob. 21PCh. 5 - Prob. 22PCh. 5 - Prob. 23PCh. 5 - The circuit in Fig. P5.24 is a noninverting...Ch. 5 - Prob. 25PCh. 5 - The op amp in the circuit of Fig. P5.25 is...Ch. 5 - The resistors in the difference amplifier shown in...Ch. 5 - Prob. 28PCh. 5 - Prob. 29PCh. 5 - The op amp in the adder-subtracter circuit shown...Ch. 5 - Select the values of Rb and Rf in the circuit in...Ch. 5 - The op amp in the circuit of Fig. P5.34 is...Ch. 5 - Prob. 33PCh. 5 - In the difference amplifier shown in Fig. P5.34,...Ch. 5 - Prob. 36PCh. 5 - Show that when the ideal op amp in Fig. P5.38 is...Ch. 5 - Assume that the ideal op amp in the circuit seen...Ch. 5 - The two op amps in the circuit in Fig. P5.40 are...Ch. 5 - Assume that the ideal op amp in the circuit in...Ch. 5 - The op amps in the circuit in Fig. P5.39 are...Ch. 5 - The circuit inside the shaded area in Fig. P5.41...Ch. 5 - Derive Eq. 5.31.
(5.31)
Ch. 5 - Prob. 44PCh. 5 - Prob. 45PCh. 5 - Repeat Problem 5.45 assuming an ideal op...Ch. 5 - Prob. 47PCh. 5 - The op amp in the noninverting amplifier circuit...Ch. 5 - Suppose the strain gages in the bridge in Fig....Ch. 5 - For the circuit shown in Fig. P5.50, show that if...Ch. 5 - Prob. 51PCh. 5 - Prob. 52PCh. 5 - Prob. 53P
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