Concept:This statement is the exact definition of Lenz's law, which determines the direction of an induced current.
Explanation:Lenz's law says that the induced current flows in a direction that opposes the change in magnetic flux that caused it.
This opposition is a direct consequence of the law of conservation of energy.
When the magnetic flux linked with a coil changes, an emf is induced in the coil.
The induced current produces its own magnetic field that tries to resist the original change.
If the magnetic flux increases, the induced current opposes the increase.
If the magnetic flux decreases, the induced current opposes the decrease.
Faraday's law gives the magnitude of the induced emf.
Lenz's law gives the direction of the induced current or emf.
Together, Faraday's law and Lenz's law are combined as the negative sign in Faraday's equation.
Answer:B. Lenz's law