Question

jacques moves a bar magnet near a circle of copper wire. moving the magnet creates a changing magnetic field passing through the copper loop. what happens to the copper wire because of the moving magnet? a. the copper wire develops a negative electric charge. b. the copper wire carries an electric current. c. the copper wire loses its magnetic charge. d. the copper wire develops a positive electric charge.

Explanation:

Step1: Recall electromagnetic induction

According to Faraday's law of electromagnetic induction, when a changing magnetic - field passes through a closed conductor loop (like the copper wire loop here), an electromotive force (emf) is induced in the loop.

Step2: Understand the result of induced emf

The induced emf causes an electric current to flow in the closed - loop conductor.

Answer:

B. The copper wire carries an electric current.