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Magnetism and Electromagnetism - Engineering

Q1:

If the steel disk in a crankshaft position sensor has stopped with the tab in the magnet's air gap, the induced voltage

A increases

B decreases

C is zero

D will remain constant

ANS:C - is zero

e = BLV
B = flux density,
L = length,
V = velocity = 0.

So,

e = 0.