Question

Determine the value of K (System constructor constant) for a MOSFET with Vgs=8V,Vt=2V and ID=10A?

(a) 0.001A/v^2

(b) 0.278 A/v^2

(c) 0.5761A/v^2

(d) 0.0021A/v^2

This question was posed to me at a job interview.

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

Answer 1

Right choice is (b) 0.278 A/v^2

Easy explanation: K=ID/(Vgs-Vt)^2

K=10/36

K=0.278.