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17. The magnetic flux through three different
coils is changing as shown in Figure
P21.17. For each situation, draw a corre-
sponding graph showing quantitatively
how the induced emf changes with time.
Figure P21.17
(T m²)
0.4
0.2
0
0
Þ(T•m²)
0.4
0 1 2 3 4
Þ(T• m²)
+0.2
0
-0.2
A
t(s)

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