There are two coils $\mathrm{A}$ and $\mathrm{B}$ as shown in Figure. A current starts flowing in $\mathrm{B}$ as shown, when $\mathrm{A}$ stops moving. The current in $\mathrm{A}$ is counterclockwise. $\mathrm{B}$ is kept stationary when $\mathrm{A}$ moves. We can infer that

Same as problem $4$ except the coil $\mathrm{A}$ is made to rotate about a vertical axis (figure). No current flows in $\mathrm{B}$ if $\mathrm{A}$ is at rest. The current in coil $\mathrm{A}$, when the current in $\mathrm{B}$ (at $t=0$) is counterclockwise and the coil $\mathrm{A}$ is as shown at this instant, $t=0$, is

Consider a magnet surrounded by a wire with an on/off switch $\mathrm{S}$ (Figure). If the switch is thrown from the off position (open circuit) to the on position (closed circuit), will a current flow in the circuit? Explain.