When the magnetic flux linked with a coil decreases
PHYSICS · Single correct · AP · Physics 2: Algebra-based · Magnetism and Electromagnetism · Magnetism and Electromagnetism
Problem
When the magnetic flux linked with a coil decreases, the induced current in the coil will set up its own magnetic field that
(a) produces a magnetic field opposite to the original field, thereby reducing the flux even further
(b) strengthens the external field, thus increasing the rate of decrease of flux
(c) opposes the decrease in flux by producing a field in the same direction as the original field
(d) reverses the direction of the external magnetic field completely