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HPHY 253 Homework 33b
AlternatingCurrent Circuits
Dr. A. E. Bak
Name
33
:
21
. A
RLC
circuit consists of a
150

resistor, a
21
:
0

capacitor, and
a
460

mH
inductor connected in series with a
120
V
,
60
:
0

Hz
power supply.
(a) What is the phase angle between the current and the applied voltage?
(b) Which reaches its maximum earlier: the current or the voltage?
33
:
24
. An AC source with
±
V
max
= 150
V
and
f
= 50
:
0
Hz
is connected
between points
a
and
d
in Figure
P
33
:
24
.
(a) Calculate the maximum voltage between points
a
and
b
.
(b) Calculate the maximum voltage between points
b
and
c
.
(c) Calculate the maximum voltage between points
c
and
d
.
(d) Calculate the maximum voltage between points
b
and
d
.
33
:
46
. Consider the ±lter circuit shown in Active Figure
33
:
23
a
.
(a) Show that
±
V
max
out
±
V
max
in
=
1
=
(
!C
)
q
R
2
+
1
!C
±
2
is the gain ratio, that is, the ratio of output to input voltage amplitudes.
(b) What value does the gain ratio approach as the frequency decreases toward zero? What value
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This note was uploaded on 05/01/2011 for the course HPHY 253 taught by Professor Bak during the Spring '09 term at Morehouse.
 Spring '09
 bak

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