NEET Electromagnetic Induction MCQs & PYQs

A coil having 500 square loops each of side 10 cm is placed normal to a magnetic flux which increases at the rate of 1.0 Tesla/second. The induced e.m.f. in volts is :

A conducting circular loop is placed in a uniform magnetic field of inducting B tesla with its plane normal to the field. Now, radius of the loop starts shrinking at the rate (dr/dt). Then the induced e.m.f. at the instant when the radius is r is :

The adjoining figure shows two bulbs B1 and B2 resistor R and an inductor L. When the switch S is turned off :

A varying current in a coil changes from 10 amp to zero in 0.5 sec. If average EMF is induced in
the coil is 220 volts, the self inductance of coil is :

A wire is bent to form the double loop shown in figure. There is a uniform magnetic field directed into the plane of the loop. If the magnitude of this field is decreasing, current will flow from :-

The figure shows four wire loops, with edge lengths of either L or 2L. All four loops will move
through a region of uniform magnetic field \[\overrightarrow{B}\] (directed out of the page) at the same constant velocity. Rank the four loops according to the maximum magnitude of the e.m.f induced as they move through the field, greatest first :-

How much length of a very thin wire is required to obtain a solenoid of length l0 and inductance L.

What is the mutual inductance of a two-loop system as shown with centre separation l ?

An equilaterial triangular loop having a resistance R and length of each side ‘l’ is placed in a magnetic field which is varying at dB/dt =1 T/s. The induced current in the loop will be :

Two coils carrying current in opposite direction placed co-axially as shown in figure. Now that brought closer to each other, than :