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Problem 9.32 What value of will cause the forced response vo in the
Figure to be zero?
v o 0 if
1
L
C
1
LC
1
(5 103 )(20 103 )
100 rad/s
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Problem 9.46 If is = 5 cos (10t + 40) A in the circuit in the Figure, find io.
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Problem 9.55 Find Z in the network, given that Vo = 40 V
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Problem 9.66
For the circuit in the Figure, calculate ZT and Vab.
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(a)Calculate the phase shift of the circuit.
Problem (b)State whether the phase shift is leading or lagging.
9.79 (c)Determine the magnitude of the output when the input
is 120 V.
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Problem 9.79
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Problem
9.84 The ac bridge shown is known as a Maxwell bridge and is used for
accurate measurement of inductance and resistance of a coil in terms of a
standard capacitance Cs. Show that when the bridge is balanced,
Lx = R2 R3 Cs and R R R
2
x
R1
3
Find Lx and Rx for R1 = 40 k, R2 = 1.6 k, R3 = 4 k, and Cs = 0.45 F
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Problem 9.84
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Problem 9.90
An industrial coil is modeled as a series combination of an
inductance L and resistance R, as shown in Fig. 9.90.
Since an ac voltmeter measures only the magnitude of a sinusoid,
the following measurements are taken at 60 Hz when
the circuit operates in the steady state:
Vs 145V,
V1 50V,
Vo 110V
Use these measurements to determine the values of L and R.
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Problem 9.90
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