A square loop of side $a$ and resistance $R$ is placed in a spatially uniform magnetic field $B$ that is perpendicular to its plane. The magnetic field decays exponentially with time according to $B(t) = B_0e^{-t/au}$. What is the total charge that flows through the loop from $t=0$ to $t=\infty$?

The current through choke coil increases from zero to $6\,\,A$ in $0.3\,\,seconds$ and an induced e.m.f. of ${\rm{30}}\,\,{\rm{V}}$ is produced. The inductance of the coil of choke is

According to phenomenon of mutual inductance

The self-inductance of a coil is 2 H. A current in the coil changes from 0 A to 4 A in 0.2 seconds. What is the magnitude of the induced emf in the coil?

Two different loops are concentric and lie in the same plane. The current in the outer loop is clockwise and increasing with time. The induced current in the inner loop then, is

The property of a coil by which an emf is induced in it due to a change in current through the coil itself is called:

Two conducting circular loops of radii ${R_1}{\rm{ and }}{R_2}$ are placed in the same plane with their centres coinciding. If {R_1} > > {R_2}, the mutual inductance $M$ between them will be directly proportional to

A long solenoid with $200$ turns per cm carries a current. If the magnetic field inside is $5\pi imes 10^{-2}$ T, what is the current?

A board is moving due east in a region where Earth’s magnetic field is 0.4 G due north and horizontal. The boat carries a vertical metallic rod of length 2 m if the speed of boat is 2.5 m/s the magnitude of induced emf across end of metallic rod is

If $100 \, mJ$ of energy is stored in an inductor when $200 \, mA$ of current flows through it, what is its inductance?

Two inductors of inductance L each are connected in series with opposite magnetic fluxes. What is the resultant inductance? (Ignore mutual inductance)