A coil is placed in a changing magnetic field and an emf is induced.What happens to the induced emf if the rate of change of magnetic field quadruples?
A)There is no change.
B)The emf doubles.
C)The emf quadruples.
D)The emf increases by a factor of 16.

Question

Quizplus · Accepted Answer

According to Faraday's law, the magnitude of the induced emf is directly proportional to the rate of change of magnetic field. If the rate of change of magnetic field quadruples, then the induced emf will also quadruple. Therefore, the correct choice is C.

A Coil Is Placed in a Changing Magnetic Field and an Emf