A cylindrical bar magnet is kept along the axis of a circular coil and near it as shown in Fig. 6.62. Will there be any induced emf at the terminals of the coil when the magnet is rotated about an axis perpendicular to the length of the magnet?

 

Three identical closed coils $A$, $B$ and $C$ are placed with their planes parallel to one another. Coils $A$ and $C$ carry currents, as shown in Fig. 6.63(a). Coils $B$ and $C$ are fixed in position and coil $A$ is moved towards $B$ with uniform motion. Is there any current induced in $B$? If yes, mark its direction.

Two coils $P$ and $S$ are arranged as shown in Fig. 6.64. What will be the direction of induced current when switch is closed?

Two coils $P$ and $S$ are arranged as shown in Fig. 6.64. What will be the direction when switch is opened?

Twelve wires of equal length are connected to form a skeleton cube which moves with a velocity '$v$' perpendicular to the magnetic field $\overrightarrow{B}$. What will be the induced emf in each arm of the cube?