Electromagnetic Induction

Two conducting circular loops of radii $R_{1}$ and $R_{2}$ are placed in the same plane with their centres coinciding. If $R_{1}\gg\,R_{2}$, the mutual inductance $M$ between them will be directly proportional to:

The variation of EMF with time for four types of generators are shown in the figures. Which amongst them can be called AC? (a) (b) (c) (d)

A conducting loop of radius $\frac{10}{\sqrt{\pi\,}}\mathrm{cm}$ is placed perpendicular to a uniform magnetic field of $0.5T$. The magnetic field is decreased to zero in $0.5s$ at a steady rate. The induced emf in the…

A conducting bar of length $L$ is free to slide on two parallel conducting rails as shown in the figure Two resistors $R_{1}$ and $R_{2}$ are connected across the ends of the rails. There is a uniform magnetic field…

The magnetic field in a region is given by$\vec{B}=B_{0}\left(\frac{x}{a}\right)\hat{k}$. A square loop of side d is placed with its edges along the $x$and $y$axes. The loop is moved with a constant velocity…

A square frame of side $10\mathrm{cm}$ and a long straight wire carrying current $1A$ are in the plane of the paper. Starting from close to the wire, the frame moves towards the right with a constant speed of…

A square loop of side $20\mathrm{cm}$ and resistance $1\Omega\,$ is moved towards right with a constant speed $v_{0}.$The right arm of the loop is in a uniform magnetic field of $5T.$The field is perpendicular to the…

A $10m$ long horizontal wire extends from North East to South West. It is falling with a speed of $5.0ms^{-1},$ at right angles to the horizontal component of the earth's magnetic field of…

The figure shows a circular area of tthe radius $R$ where a uniform magnetic field $\vec{B}$is going into the plane of the paper and increasing in magnitude at a constant rate. In that case, which of the following…

In a coil of resistance $100\Omega\,$, a current is induced by changing the magnetic flux through it as shown in the figure. The magnitude of change in flux through the coil is:

A conducting circular loop is placed in a uniform magnetic field of $0.4T$ with its plane perpendicular to the field. Somehow, the radius of the loop starts expanding at a constant rate of $1\mathrm{mm}s^{-1}$. The…

A horizontal straight wire $5m$ long extending from east to west falling freely at right angle to horizontal component of earth's magnetic field $0.60\times\,10^{-4}\mathrm{Wb}m^{-2}$. The instantaneous value of emf…