A small bar magnet is moved through a coil at constant speed from one end to the other. Which of the following series of observations will be seen on the galvanometer $\text{G}$ attached across the coil?

 

Three positions shown describe: (a) the magnet's entry (b) magnet is completely inside and (c) magnet's exit.

An infinitely long straight wire carrying current $I$, one side opened rectangular loop and a conductor $C$ with a sliding connector are located in the same plane, as shown in the figure. The connector has length $l$ and resistance $R$. It slides to the right with a velocity $v$. The resistance of the conductor and the self-inductance of the loop are negligible. The induced current in the loop, as a function of separation $r$, between the connector and the straight wire is:

A part of a complete circuit is shown in the figure. At some instant, the value of current I is $1\mathrm{A}$ and it is decreasing at a rate of ${10}^2{\mathrm{As}}^{-1}$. The value of the potential difference ${\mathrm{V}}_{\mathrm{p}}-{\mathrm{V}}_{\mathrm{Q}},$ (in volts) at that instant is-