Lenz's Law

Uniform but time varying magnetic field $\mathrm{B}=\frac{{\mathrm{B}}_0\mathrm{t}}{\mathrm{T}}$ is present in the cylindrical region. There is small section at corners which is made with insulating material and other portion of rectangular loop is conducting. Loop is moving with constant velocity $\mathrm{v}$. At $\mathrm{t}=\mathrm{T}$ situation is as shown in figure . $\mathrm{C}$ is centre of cylindrical region. Choose correct option/s at the given instant.

Two identical circular coils $M$ and $N$ are arranged coaxially as shown in the figure. Separation between the coils is large as compared to their radii. The arrangements is viewed from left along the common axis. The sign convention adopted is that currents are taken to be positive when they appear to flow in clockwise direction. Then

A uniform disc of radius $R$ having charge $Q$ distributed uniformly all over its surface is placed on a smooth horizontal surface. A magnetic field, $B=kx{t}^2$, where $k$ is a constant $x$ is the distance (in metre) from the centre of the disc and $t$ is the time (in second), is switched on perpendicular to the plane of the disc. Find the torque (in $N-m$) acting on the disc after $15\sec$. (Take $4\mathrm{kQ}=2.50$ S.I. unit and $R=1\mathrm{m}$).

Fundamental property of a type of superconducting material is that $\overrightarrow{B}=0$ everywhere inside it. If a sample of the material is placed into an externally produced magnetic field or is cooled to become superconducting while it is in a magnetic field, electric currents appears on the surface of the sample. The current have precisely the strength and orientation required to make the total magnetic field be zero throughout interior of the sample. Length of solenoid creating field $=l$, total no. of turns $=N$, Area of solenoid $=A$.

A movable wire is moved to the right, that causes an anti-clock-wise induced current as shown in the figure. The direction of magnetic induction in the region P points

Lenz 's law used to find out the direction of

Lenz's law is a consequence of the law of conservation of

The negative sign in Lenz's law indicates that the flow of current support the change in flux.

A small bar magnet $A$ is falling vertically downward through a fixed horizontal conducting ring $R$ as shown. If $g$ be the acceleration due to gravity, then the acceleration of $A$ will be

State and explain Lenz's law in accordance with principle of conservation of energy.

Write down Lenz's law for electromagnetic induction and explain that Lenz's law follows the law of energy conservation.

A to B are two metallic rings placed at opposite sides of an infinitely long straight conducting wire as shown. When the current in the wire is slowly decreased, what will be the direction of induced current ?

A metallic ring with a small cut is held horizontally and a magnet is then allowed to fall vertically through the ring. Then what must have been the acceleration of the magnet ?

As shown in the above figure, a magnetic field is directed into the plane of the coil $\mathrm{ABCD}$. If the field is increasing at a constant rate, then find the directions of induced currents in wires $\mathrm{AB}$ and $\mathrm{CD}$, respectively:

As shown in the above figure, a magnet is pushed towards a fixed ring along its axis until the magnet passes through the ring. Now, choose the correct statement from the following:

Lenz's law is based on conservation of

The Lenz law is consequence of conservation of

Two coils, carrying currents in opposite directions are placed co-axially with their centres at some finite separation. If they are brought closer to each other, then the current flowing in them should be:

In which direction will the induced current flow through the loop, at time $t=2.00 \mathrm{s}$?

The magnetic field in the cylindrical region shown in figure increase at a constant rate of $10.0 \mathrm{m}\mathrm{T} {\mathrm{s}}^{-1}.$ Each side of the square loop $\mathrm{a}\mathrm{b}\mathrm{c}\mathrm{d}$ and $\mathrm{d}\mathrm{e}\mathrm{f}\mathrm{a}$ has a length of $2.00 \mathrm{c}\mathrm{m}$ and a resistance of $2.00 \mathrm{\Omega }.$ Correctly match the current in the wire $\mathrm{a}\mathrm{d}$ in four different situations as listed in column $\mathrm{I}$ with the values given in column $\mathrm{I}\mathrm{I}.$