If the magnetic flux through a certain region is changing with time:
A) energy must be dissipated as heat
B) an electric field must exist at the boundary
C) a current must flow around the boundary
D) an emf must exist around the boundary
E) a magnetic field must exist at the boundary

Question

Quizplus · Accepted Answer

According to Faraday's Law, a changing magnetic flux through a closed loop induces an electromotive force (emf) around the loop, which can lead to a current if there is a complete circuit. Therefore, an emf must exist around the boundary when the magnetic flux through a certain region is changing with time. There may or may not be an electric field or magnetic field at the boundary, and energy dissipation as heat or current flow around the boundary depend on the specific circumstances of the situation.

If the Magnetic Flux Through a Certain Region Is Changing