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108. (Third problem of
Cluster
)
(a) , (b) and (c) The area enclosed by the loop is that of a rectangle with one side (
x
) expanding. With
B
0
=0
.
200 T and
ξ
=0
.
050 T/s (the rate of Feld increase), we have
Φ=
BA
=(
B
0
+
ξt
)(
Lx
)
=
B
0
Lvt
+
ξLvt
2
where
x
=
vt
has been used. Thus, from ±araday’s and Ohm’s laws, the induced current is
i
=
E
R
=
B
0
Lv
R
+2
ξLv
R
t
and is counterclockwise (to produce Feld in the loop’s interior pointing out of the page, “Fghting”
the increasing inward pointed ﬂux due to the applied Feld). Therefore, the current at
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This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.
 Fall '08
 SPRUNGER
 Physics

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