If the instantaneous emf and the instantaneous current equations of an A.C. circuit are respectively.

$e=E0\sin (\omega t-\pi /6),i=I0\sin (\omega t+\pi /6),$ then the phase difference between voltage and current is :

Obtain an expression for the mutual inductance of two long solenoids.

The alternating current in a circuit is given by the equation $\mathrm{i}=10\sin \left(100\mathrm{\pi t}+\frac{\mathrm{\pi }}{6}\right)$. The current attains its first maximum at $\mathrm{t}$ is:

Define Peltier Coefficient.

The number of turns in the primary of an ideal transformer is $400$and that in the secondary is $2000$. If the output power from the secondary at $1000 \mathrm{V}$ is $10 \mathrm{kW}$ then calculate the voltage and current in the primary coil.

Obtain an expression for the energy associated with an inductor.

Discuss with theory, the method of inducing emf in a coil by changing its orientation with respect to the direction of the magnetic field.