A coil of wire is connected to a galvanometer.When a bar magnet is moved in and out of the coil,the galvanometer records a current.The current results because
A)the coil acts like a transformer.
B)the changing magnetic field induces an electric field in the wire.
C)an electromagnetic wave is generated.
D)the wire is ferromagnetic.
E)none of the above

Question

Quizplus · Accepted Answer

When a bar magnet is moved in and out of the coil, the magnetic field lines passing through the coil are changing, and this changing magnetic field induces an electric field in the wire according to Faraday's Law of Electromagnetic Induction. This induced electric field causes a current to flow in the coil, which can be detected by the galvanometer.

A Coil of Wire Is Connected to a Galvanometer