(a) In the circuit of let vS 5 24 V, R1 5 300 V, R XXXXXXXXXXV, and R XXXXXXXXXXV. Find iS for a 20-mA diode current. (b) If iS 5 15 mA, fi nd vS for a 4-V drop across the diode. (c) If iS 5 10 mA, fi...

(a) In the circuit of let vS 5 24 V, R1 5 300 V, R2 5 200 V, and R3 5 400 V. Find iS for a 20-mA diode current. (b) If iS 5 15 mA, fi nd vS for a 4-V drop across the diode. (c) If iS 5 10 mA, fi nd vS so that the diode voltage and current are both zero. (d) Find vS and iS for a 30-mA current through the 200-V resistance, and a 20-mA current through the 300-V resistance. Is the solution unique?