Question

If channel thickness increases, the internal pinch-off voltage ___________

(a) Decreases

(b) Increases

(c) Remains the same

(d) Increases logarithmically

I got this question during an interview.

Enquiry is from Characteristics of JFET topic in section FET Amplifiers of Analog Circuits

Answer 1

Correct option is (b) Increases

To explain: The internal pinch off voltage is directly proportional to the channel thickness. If the channel thickness increases, the pinch off voltage increases.