After the switch $S$ shown in Figure A is closed, there is current $i$ through resistance $R.$ Figure B indicates current variation curves $a, b, c$ and $d$ for four sets of values of $R$ and capacitance $C:\left(1\right)R_0$ and $C_0,\left(2\right)$ $2R_0$ and $C_0$,$\left(3\right)$ $R_0$ and $2C_0$, $\left(4\right)2R_0$ and $2C_0$. Which set goes with which curve?

In the circuit shown, the charge on the $3\mu \mathrm{F}$ capacitor at steady state will be

Under steady state condition

In the circuit shown, the switch is shifted from position $1\to 2$ at $t=0.$ The switch was initially in position $1$ since long time. The graph between charge on capacitor $C$ and time$\text{'}f\text{'}$ is

In the circuit shown, $C_1=1\mu \mathrm{F},C_2=3\mu \mathrm{F}$ in steady state, the energy stored in these capacitors are respectively

Electric current is passing uniformly through a solid cylindrical wire of radius $R$. The current $i$ passing through circular cross-section of radius $r$ measured from the axis of the cylinder $(r<R)$ varies as shown in