The magnetic field and the number of turns in a coil of wire are doubled. Assuming that all the other parameters remain the same, what happens to the induced emf in that coil of wire?
A) It is doubled.
B) It is reduced by a factor of 2.
C) It is quadrupled.
D) It is reduced by a factor of 4.
E) It stays the same.

Question

Quizplus · Accepted Answer

The induced emf in a coil is given by Faraday's law of electromagnetic induction, which states that the emf is proportional to the rate of change of magnetic flux. Since the magnetic field and the number of turns are both doubled, the magnetic flux linkage is quadrupled, resulting in the induced emf being quadrupled.

The Magnetic Field and the Number of Turns in a Coil