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 sense of the induced current in this coil as the field fades?
A)The induced current flows counterclockwise.
B)The induced current flows clockwise.
C)There is no induced current in this coil.
D)The current flows clockwise initially,and then it flows counterclockwise before stopping.

Question

Quizplus · Accepted Answer

According to Lenz's Law, the induced current will flow in a direction that opposes the change in magnetic flux. Since the magnetic field is pointing up and vanishes, the induced current will create its own magnetic field pointing up, resulting in a counterclockwise current when viewed from above.

A Coil Lies Flat on a Tabletop in a Region