Question

Which of the following is the necessary to hold drain current in 0 for n channel E-MOSFET?

(a) Vgs > Vt

(b) Vgs < Vt

(c) Vgs < 2Vt

(d) 2Vgs > Vt

This question was posed to me by my college director while I was bunking the class.

This question is from The Insulated-Gate FET(MOSFET) in section Field-Effect Transistors of Electronic Devices & Circuits

Answer 1

The correct answer is (b) Vgs < Vt

The explanation: For Vgs < Vt, the channel is not created and hence there will be no electron flow from source to drain. Therefore the drain current will be zero.