When the number of loops of wire in a coil is doubled, assuming all the other factors stay constant, the induced emf
A) becomes four times larger.
B) becomes two times larger.
C) stays the same.
D) becomes two times smaller.
E) becomes four times smaller.

Question

Quizplus · Accepted Answer

The induced emf in a coil is directly proportional to the number of loops, so doubling the number of loops doubles the induced emf.

When the Number of Loops of Wire in a Coil