Question

Lenz’s law states that an induced magnetic field in a conductorA. Opposes the change in flux through the conductor.B. Opposes the applied magnetic field.C. Induces a matching electric field that causes a current.D. Opposes the applied flux through the conductor.

Answer 1

Answer:

D. Opposes the applied flux through the conductor.

Explanation:

• According to the Lenz's law, the direction of induced e.m.f is such that it generates a current which in turn produces a magnetic field that would oppose the change causing it.
• In other words, the direction of any magnetic induction effect is such that it opposes the cause of the effect.
• Therefore; an induced magnetic field in a conductor, opposes the applied flux through the conductor.

Answer 2

Answer:

A. Opposes the change in flux through the conductor.

Explanation:

Here we can say that as per Lenz law the induced EMF direction is always opposite in the direction of the rate of change in flux in the coil.

If the flux is increasing in the closed loop due to some external source of EMF then in that case the induced EMF will will always induced a current that will oppose the external change increasing flux

And same if applicable is the external flux is decreasing so in that case the induced current in loop will always in such a direction that will increase the flux.

So we can say that induced EMF is given by Faraday's law but the direction of induced current is only by the help of Lenz law

$EMF = - \frac{d\phi}{dt}$