The number of turns in the coil of a generator is reduced by a factor of 2 and at the same time it is rotated twice as fast keeping other factors constant. What happens to the value of the maximum induced emf?
A) It is reduced by a factor of 2.
B) It is reduced by a factor of 4.
C) It is doubled.
D) It stays the same.
E) It is quadrupled.

Question

Quizplus · Accepted Answer

The maximum induced emf is proportional to the product of the number of turns and the angular velocity. Reducing the number of turns by a factor of 2 and doubling the angular velocity results in no net change in the maximum induced emf.

The Number of Turns in the Coil of a Generator