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74. (a) With a phase constant of 45º the (net) reactance must equal the resistance in the
circuit, which means the circuit impedance becomes
Z = R
2
⇒
R
= Z/
2
= 707
Ω
.
(b) Since
f
= 8000 Hz then
ω
d
= 2
π
(8000) rad/s.
The net reactance (which, as observed,
must equal the resistance) is therefore
X
L
–
X
C
=
ω
d
L
– (
ω
d
C
)
−
1
= 707
Ω
.
We are also
told that the resonance frequency is 6000 Hz, which (by Eq. 314) means
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This note was uploaded on 06/03/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.
 Spring '08
 Any
 Physics, Resistance

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