Faraday's law of induction states that the emf induced in a rectangular loop of wire is proportional to
A) the magnetic flux.
B) the time variation of the magnetic flux.
C) current divided by the time.
D) the magnetic flux density times the area of the loop.

Question

Quizplus · Accepted Answer

Faraday's law of induction states that the emf induced in a loop is proportional to the rate of change of flux through the loop. Therefore, the correct option is B, which states that the emf induced is proportional to the time variation of the magnetic flux. The other options are not correct because A is only the magnetic flux, and does not consider time variation, C is the formula for average current, and D is the formula for magnetic flux, not emf.

Faraday's Law of Induction States That the Emf Induced in a Rectangular