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Unformatted text preview: the × it is directed
toward the upper-left, or arrow VIII.
003 (part 3 of 3) 10.0 points
Throughout this region there is a uniform
electric ﬁeld E into the paper. This electric
ﬁeld begins to increase at a rate dE/dt, and
there continues to be a current I in the wire.
Now what is the magnitude of the magnetic
ﬁeld at the indicated point?
1. B = µ0 2 N I
2 π c2 dt dedow (kfd235) – Ch24-h1 – turner – (56525) 2. B = µ0 2 N I
2 c dt 3. B = µ0 N I
R 2 dE
4 c dt 4. B = R dE
µ0 N I
2 c dt 5. B = µ0 2 N I
R 2 dE
2 π c2 dt Explanation:
Use Ampere’s law, as modiﬁed by Maxwell,
around the same loop C :
B · d = µ0 I + µ0 0 C 2 π R B = µ0 I + µ0
⇒B= d ΦE
dt 0A dE
dt µ0 0 π R 2 d E
µ0 2 N I
dt = µ0 2 N I
2 c dt 004 10.0 points
If the magnetic ﬁeld in a particular pulse has
a magnitude of 4.3 × 10−5 T (comparable to
the Earth’s magnetic ﬁeld), what is the magnitude of the...
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This note was uploaded on 01/22/2014 for the course PHY 303L taught by Professor Turner during the Summer '08 term at University of Texas at Austin.
- Summer '08