When a magnet is moved to and fro in a wire coil, voltage is induced. If the coil has twice as many loops, the voltage induced is
A)half.
B)the same.
C)twice.
D)four times as much.
E)none of the above

Question

Quizplus · Accepted Answer

According to Faraday's law of electromagnetic induction, the voltage induced in a coil is directly proportional to the number of loops in the coil. Therefore, if the number of loops is doubled, the voltage induced will also be doubled.

When a Magnet Is Moved to and Fro in a Wire