The reactance of a circuit is zero. It is possible that the circuit contains:

In the circuit shown in the figure, the source frequency is $\omega = 2000 \, rad/s$. The current in the circuit will be:

$A$ $ 100 \,W $ bulb is connected to an $ AC $ source of $ 220 \,V, 50 \,Hz $. Then the current flowing through the bulb is

The following figure shows an $AC$ generator connected to a 'black box' through a pair of terminals. The box contains possible $R, L, C$ or their combination,whose elements and arrangements are not known to us. Measurements outside the box reveal that $e = 75 \sin(\omega t) \text{ V}$ and $i = 1.5 \sin(\omega t + 45^\circ) \text{ A}$. Then,the wrong statement is:

Match the List-$I$ with List-$II$.

List-$I$	List-$II$
$A$. $AC$ generator	$I$. Presence of both $L$ and $C$
$B$. Transformer	$II$. Electromagnetic Induction
$C$. Resonance phenomenon to occur	$III$. Quality factor
$D$. Sharpness of resonance	$IV$. Mutual Inductance

Choose the correct answer from the options given below:

If the input voltage $V_i$ to the circuit below is given by $V_i(t) = A \cos (2 \pi f t)$ and the output voltage is given by $V_o(t) = B \cos (2 \pi f t + \phi)$,which one of the following four graphs best depicts the variation of $\phi$ versus $f$?