KCET 2016 Physics Solved Paper

Given, number of spokes = 10; length of each spoke = L; angular velocity = ω; angular field = B
Therefore, emf induced between axle and rim is given as
E=Blvavg=‌

Blv

2

=BL‌

rω

2

Now, here r=L
⇒E=

BL2ω

2

Thus, emf induced between the axle and rim of the wheel is

1

2

BL2ω