A conducting square loop is placed around a bar magnet. As the loop moves away from the magnet,
A) the magnet and the loop attract one another.
B) the magnet and the loop repel one another.
C) the magnet repels the loop, but the loop attracts the magnet.
D) the magnet attracts the loop, but the loop repels the magnet.
E) there is neither attraction nor repulsion between the loop and the magnet.

Question

Quizplus · Accepted Answer

When a conducting loop moves away from a magnet, a current is induced in the loop due to the changing magnetic flux, according to Faraday's law of electromagnetic induction. According to Lenz's law, the direction of the induced current will be such that it opposes the change that caused it. In this case, the induced current will create a magnetic field that opposes the loop's motion away from the magnet, effectively attracting the loop towards the magnet. This means the magnet and the loop attract one another.

A Conducting Square Loop Is Placed Around a Bar Magnet