Lenz's law: A coil lies flat on a tabletop in a region where the magnetic field vector points straight up. The magnetic field vanishes suddenly. When viewed from above, what is the direction of the induced current in this coil as the field fades?

Question

Quizplus · Accepted Answer

According to Lenz's law, the induced current will flow in a direction that opposes the change in the magnetic field that caused it. In this case, as the magnetic field fades, the induced current will flow in a direction to produce a magnetic field that opposes the fading field. The direction of the induced current can be determined using the right-hand rule. If you place your right thumb in the direction of the fading magnetic field, your curled fingers will point in the direction of the induced current. In this case, the induced current will flow counterclockwise, as viewed from above.

Lenz's Law: a Coil Lies Flat on a Tabletop in a Region