Question

What is pinch off voltage?

(a) The minimum voltage required to turn on the FET

(b) The maximum voltage a FET can withstand

(c) Current amplification factor/voltage gain

(d) The value of voltage at which the current gets pinched to zero

I have been asked this question in final exam.

Asked question is from The Pinch off Voltage Vp topic in portion Field-Effect Transistors of Electronic Devices & Circuits

Answer 1

The correct answer is (d) The value of voltage at which the current gets pinched to zero

To explain I would say: Once the voltage difference between the gate and source goes near to the pinch off voltage, the channel will get pinched off resulting in off state of the FET, which makes no conventional current flow.