Which of the following components cannot be easily fabricated or obtained from an $IC$ (Integrated Circuit)?

$A$ diode is connected to $220 \, V \, (rms) \, ac$ in series with a capacitor as shown in the figure. The voltage across the capacitor is

In the given figure,the voltage of point $A$ is ............ $V$.

On increasing the reverse bias to a large value in a $P-N$ junction diode,current

The approximate ratio of resistances in the forward and reverse bias of the $PN$-junction diode is

The current-voltage relation of a diode is given by $I = (e^{1000V/T} - 1) \; mA$,where the applied voltage $V$ is in volts and the temperature $T$ is in Kelvin. If a student makes an error of $\pm 0.01 \; V$ while measuring the voltage to obtain a current of $5 \; mA$ at $300 \; K$,what will be the error in the value of the current in $mA$?