Question

From the circuit and the diode characteristics given and assuming R=1k, what is the value of diode current at operating point?

(a) 20 mA

(b) 9.3 mA

(c) 0 mA

(d) 10 mA

This question was posed to me in a national level competition.

My question is based upon Load Line Analysis in section Diode Circuit of Analog Circuits

Answer 1

Right answer is (b) 9.3 mA

Best explanation: On drawing the load line with the equation: VD = ED + IDRD, we get the operating point with the value of current at around 9.2-9.4 mA. Hence, IDq=9.3 mA.