Question

A wheel with spokes of radius r is rotating at a frequency of n revolutions per second in a plane perpendicular to the magnetic fields B tesla . What is the emf induced between the axle and rim of the wheel ? ​

Answer 1

Answer:

we have no of spoken (N)=10 length of each spoke(L)=0.5m magnetic field (B)=0.4×10

−4

T=4×10

−5

frequency (f)=120rpm=2rps

induced emf between exle & rim is

given by,

e=N×B×l

2

×π×t

=10×4×

−5

×0.5×0.5×3.14×2v

=6.28×10

−5

V

Explanation:

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