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Example 4: A 0.20-m length of wire moves at<br />
a constant speed of 5 m/s in at 140 0 with a<br />
0.4-T B-Field. What is the magnitude and<br />
direction of the induced emf in the wire?<br />
E=<br />
E=BLv sinq<br />
0<br />
(0.4 T)(0.20 m)(5 m/s)sin140<br />
v<br />
q<br />
North<br />
B<br />
E = -0.257 V<br />
South<br />
Using right-hand rule, point fingers<br />
to right, thumb along velocity, and<br />
hand pushes in direction of induced<br />
emf—to the north in the diagram.<br />
v<br />
South<br />
I<br />
North<br />
B
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