Question

For the circuit shown, find the quiescent point.

(a) (6V, 1mA)

(b) (4V, 10mA)

(c) (10V, 3mA)

(d) (3mA, 10V)

I have been asked this question in an interview.

The origin of the question is DC Load Lines in division Transistor Characteristics of Electronic Devices & Circuits

Answer 1

Correct option is (c) (10V, 3mA)

The best I can explain: We know, VCE=12V

(IC)SAT =VCC/RL=12/6K=2mA. IB=10V/0.5M=20µA. IC= βIB=1mA. I

VCE=VCC-ICRL=12-1*6=6V. So, quiescent point is (6V, 1mA).