Electromagnetic Induction and Alternating Current: Flux Cutting Rule MCQ

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Flux Cutting RuleMediumQuestion 20185

Question

A rectangular loop moves into a uniform magnetic field with velocity v. While partly inside, the induced EMF is:

A
Zero — flux is still changing
B
BLv where L is the side of the loop cutting the field lines
Correct
C
Maximum at the centre
D
Depends only on the total flux inside

Correct answer

BLv where L is the side of the loop cutting the field lines

Explanation

Only the side entering the field cuts field lines. That side acts as a source of motional EMF = BLv. The other three sides are either fully inside (no EMF) or outside (no flux).

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