A silicon pn junction diode has an emission coefficient of \(n=1\). The diode current is \(I_{D}=1 \mathrm{~mA}\) when \(V_{D}=0.7 \mathrm{~V}\).

(a) What is the reverse-bias saturation current?

(b) Plot, on the same graph, \(\log _{10} I_{D}\) versus \(V_{D}\) over the range \(0.1 \leq V_{D} \leq 0.7\mathrm{~V}\) when the emission coefficient is (i) \(n=1\) and (ii) \(n=2\).