Exercise-1

Match the following:

When current changes from $+2 \mathrm{A}$ to $-2 \mathrm{A}$ in $0·05 \mathrm{s}$, an e.m.f. of $8 \mathrm{V}$ is induced in a coil. The coefficient of self-induction of the coil is

Consider a metal ring kept on a horizontal plane. A bar magnet is held above the ring with its length along the axis of the ring. If the magnet is dropped freely the acceleration of the falling magnet is ( $g$ is acceleration due to gravity)

In the inductive circuit given in fig. the current rises after the switch is closed. At instant, when the current is $15 \mathrm{mA}$. Then potential difference across the inductor is :-

Two identical inductance carry currents that vary with time according to linear laws (as shown in figure). In which of two inductance is the self induction emf greater?

A conducting wire frame is placed in a magnetic field which is directed into the paper. The magnetic field is increasing at a constant rate. The directions of induced current in wires $AB$ and $CD$ are :-

In $\mathrm{ac}$ circuit when $\mathrm{ac}$ ammeter is connected it reads $i$ current if a student uses $\mathrm{dc}$ ammeter the reading in the $\mathrm{dc}$ ammeter will be

In an $\mathrm{LC}$ circuit, the capacitor has maximum charge $q_0$. The value of ${\overline{)\frac{\mathrm{di}}{\mathrm{dt}}}}_{\max }$ is