Question

In which of the regions, the small capacitors are open circuited?

(a) high frequency

(b) medium frequency

(c) low frequency

(d) the region does not affect he capacitors

This question was posed to me in an interview.

Question is taken from Problems on AC and DC Analysis topic in division Small-Signal Low-Frequency AC models of Transistors of Electronic Devices & Circuits

Answer 1

The correct choice is (c) low frequency

The best I can explain: In low frequency region, the small capacitors are open circuited and large capacitors are in active state. In high frequency region, the large capacitors are short circuited and small capacitors are active.