When a switch is closed allowing current to flow in coil A, the current induced in a nearby coaxial but unconnected coil B will flow
A) only momentarily and then stop
B) steadily until the current flow in A is shutoff
C) will not flow at all since the coils are not connected
D) will keep flowing long after the current in A is shut off

Question

Quizplus · Accepted Answer

When a switch is closed, allowing current to flow in coil A, electromagnetic induction causes a current to be induced in coil B only momentarily. This happens due to the change in magnetic flux that occurs when the current in coil A starts. Once the current in coil A reaches a steady state, the magnetic flux through coil B stops changing, and thus, the induced current in coil B stops as well.

When a Switch Is Closed Allowing Current to Flow in Coil