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Practice Problem 2
The generator coil shown below is rotated
through 14 of a revolution in 15 ms. The 200-turn
circular coil has a 5.00 cm radius and is in a
uniform 1.25 T magnetic field. What is the
average emf induced?
Φ
emf = -NA
At
o = BA cos 0
Carbon
brush
N
Path of motion
90°
B
Carbon
brush
S
Coil rotated by
mechanical means

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