Mark the incorrect statement

You are given many resistances, capacitors and inductors. These are connected to a variable $DC$ voltage source (the first two circuits) or an $\mathrm{AC}$ voltage source of $50 \mathrm{~Hz}$ frequency (the next three circuits) in different ways as shown in Column $II$. When a current $I$ (steady state for $DC$ or rms for $AC$) flows through the circuit, the corresponding voltage $\mathrm{V}_1$ and $\mathrm{V}_2$. (indicated in circuits) are related as shown in Column $\mathrm{I}$. Match the two

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An inductor $L, a$ resistance $R$ and two identical bulbs $B_1$ and $B_2$ are connected to a battery through a switch $S$ as shown in the figure. The resistance of coil having inductance $L$ is also $R$. Which of the following statement gives the correct description of the happenings when the switch $S$ is closed?

A light bulb and an open coil inductor are connected to an ac source through a key as shown in Figure

The switch is closed and after sometime, an iron rod is inserted into the interior of the inductor. The glow of the light bulb $(a)$ increases; $(b)$ decreases; $(c)$ is unchanged, as the iron rod is inserted. Give your answer with reasons

Two resistors are connected in series across a $5\,V\,rms$ source of alternating potential. The potential difference across $6\,\Omega  $ resistor is $3\,V$. If $R$ is replaced by a pure inductor $L$ of such magnitude that current remains same, then the potential difference across $L$ is…….$V$