Answer:
Option (c)
Step-by-step explanation:
Magnetic flux is defined as the number of magnetic field lines passing through any area.
Magnetic flux = B.A
Where B is the strength of magnetic field and A be the area through which the flux is passing.
When a magnetic flux linked with a coil changes, an electric emf is induced in the coil and hence an electric current is also induced. This phenomenon is called electromagnetic induction.