At a certain instant, coil A is in a 10-T external magnetic field and coil B is in a 1-T external magnetic field. Both coils have the same area and are oriented at right angles to the field. Which
Coil will have a greater emf induced in it?
A) coil A
B) coil B
C) It is impossible to know without more information about the fields.

Question

Quizplus · Accepted Answer

The induced emf depends on the rate of change of the magnetic flux through the coil, not just the strength of the magnetic field. Without information on how the magnetic fields are changing over time, we cannot determine which coil will have a greater emf induced in it.

At a Certain Instant, Coil a Is in a 10-T