A small, circular loop of wire is placed inside a long solenoid carrying a current. The plane of the loop contains the axis of the solenoid. If the current in the solenoid is varied, the current induced in the loop is

A horizontal solenoid is connected to a battery and a switch (figure). A conducting ring is placed on a frictionless surface, the axis of the ring being along the axis of the solenoid. As the switch is closed, the ring will

Two circular coils $\mathrm{A} \mathrm{and} \mathrm{B}$ are facing each other as shown in figure. The current $\mathrm{i}$ through A can be altered

Two identical conductors $\mathrm{P} \mathrm{and} \mathrm{Q}$ $\mathrm{R} \mathrm{and} \mathrm{S}$are placed on two frictionless fixed conducting rails $\mathrm{R}$ and $\mathrm{S}$ in a uniform magnetic field directed into the plane. If $\mathrm{P}$ is moved in the direction shown in figure with a constant speed, then rod $\mathrm{Q}$

A square coil $\mathrm{ACDE}$ with its plane vertical is released from rest in a horizontal uniform magnetic field B of length $2\mathrm{L}.$ The acceleration of the coil is

In the figure shown, the magnet is pushed towards the fixed ring along the axis of the ring and it passes through the ring.

$\mathrm{A} \mathrm{and} \mathrm{B}$ are two metallic rings placed at opposite sides of an infinitely long straight conducting wire as shown. If current in the wire is slowly decreased, the direction of induced current will be :