Electromagnetic Induction

A thin semicircular conducting ring of radius R is falling with its plane vertical in a horizontal magnetic induction B. At the position MNQ the speed of ring is V and emf developed across the ring is

A conducting rod AB is in contact with metal rails AC and BD, which are $0.25$ m apart in a uniform magnetic field of induction $0.4$ T acting perpendicular to the plane of the figure. Ends C and D are connected through…

A thin semicircular conducting ring (PQR) of radius r is falling with its plane vertical in a horizontal magnetic field B as shown in the figure. The potential difference developed across the ring when its speed is v,…

The north pole of the magnet is brought near a metallic ring as shown in figure. The direction of induced current in the ring (if looked from upside) will be

The variation of induced emf (E) with time (t) in a coil if a short bar magnet is moved along its axis with a constant velocity is best represented as $\{$North pole is situated at left end of the bar magnet and South…

A magnetic field induction is changing in magnitude at a constant rate $\dfrac{dB}{dt}$. The plane of a circular loop of radius $r$ of copper wire (mass $m$ and radius $a$) is placed perpendicular to the field. The…

Two conducting circular loops of radii $R_1$ and $R_2$ are placed in same plane with their centers coinciding. If $R_1 > R_2$ and current I is flowing through the circular loop of radius $R_1$, then mutual inductance…

In an a.c. generator, a rectangular coil of $1000$ turns each having area $\dfrac{10^{-2}}{\pi}\ \text{m}^2$ is rotated at $180$ r.p.m. about an axis perpendicular to a uniform magnetic field of magnitude $2$ T. The…

A wire of length $1\ \text{m}$ is moving at a speed of $2\ \text{m/s}$ perpendicular to its length in a homogeneous magnetic field of $0.5\ \text{T}$. If the ends of the wire are joined to a circuit of resistance $6\…

When four inductors of the same inductances L are connected in series, and I is the current passing through the circuit. The energy stored in the circuit is

Two identical inductors are connected in parallel. If the parallel combination stores $40\ \text{J}$ of magnetic field energy when a total current of $2\ \text{A}$ is passed through it, the value of the self-inductance…

Identify the CORRECT statement