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33. (a) The generator emf is a maximum when sin(
ω
d
t
–
π
/4) = 1 or
d
t
–
π
/4 = (
π
/2) ± 2
n
π
[
n
= integer].
The first time this occurs after
t
= 0 is when
d
t
–
π
/4 =
π
/2 (that is,
n
= 0). Therefore,
t
d
==
=
×
−
33
673 10
3
π
4
π
4(350
rad / s)
s.
.
(b) The current is a maximum when sin(
d
t
– 3
π
/4) = 1, or
d
t
– 3
π
/4 = (
π
/2) ± 2
n
π
[
n
= integer].
The first time this occurs after
t
= 0 is when
d
t
– 3
π
/4 =
π
/2 (as in part (a),
n
= 0).
Therefore,
t
d
=
×
−
55
112 10
2
π
4
π
4(350
rad / s)
(c) The current lags the emf by
/2
π
+
rad, so the circuit element must be an inductor.
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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, Current

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