MAGNETIC FLUX & INDUCED EMF FOR JEE 2021

A copper ring and a wooden ring of same dimension are placed so that there is same magnetic flux through each. Is induced current or induced EMF same in each case when flux · starts varying at the same rate in both.

What is the change in magnetic flux produced in a coil in 25 s, if the induced e.m.f. In the coil is 2 mV ?

The magnetic flux in a coil of 100 turns increase by 12 xx10^(3) Maxwell in 0.2 s due to the motion of a magnet . The emf induced in the coil will be :-

A: When the magnetic flux through a loop is maximum, induced emf is maximum. R: When the magnetic flux through a loop is minimum, induced emf is minimum.

Assertion (A): Whenever the magnetic flux linked with a closed coil changes there will be an induced emf as well as an induced current. Reason (R ) : Accroding to Faraday, the induced emf is inversely proportional to the rate of change of magnetic flux linked with a coil.

Asseration: The induced emf in a conducting loop of wire will be non zero when it rotates in a uniform magnetic field. Reason: The emf is induced due to change in magnetic flux.