If the strength of the magnetic field applied to a loop of wire is doubled, what happens to the induced emf in that loop assuming all the other parameters remain unchanged?
A) It stays the same.
B) It is doubled.
C) It is tripled.
D) It is quadrupled.
E) It is reduced by a factor of 2.

Question

Quizplus · Accepted Answer

According to Faraday's law of electromagnetic induction, the induced emf is directly proportional to the rate of change of magnetic flux through the loop. Therefore, if the strength of the magnetic field applied to the loop is doubled, the rate of change of the magnetic flux also doubles, hence the induced emf doubles as well.

If the Strength of the Magnetic Field Applied to a Loop