When a bar magnet is thrust into a coil of copper wire, the coil tends to
A)attract the magnet as it enters.
B)repel the magnet as it enters.
C)both of these
D)neither of these

Question

Quizplus · Accepted Answer

According to Faraday's law of electromagnetic induction, when a magnet is inserted or moved inside a coil of wire, a changing magnetic field is produced which induces an electromotive force (EMF) in the coil. This EMF creates an electric current that flows through the coil and generates a magnetic field that opposes the motion of the magnet. This is known as Lenz's law. Therefore, the coil of wire will repel the magnet as it enters.

When a Bar Magnet Is Thrust into a Coil of Copper