Question

At channel pinch off

(a) The width of the induced channel becomes non linear

(b) The width of the induced channel becomes very large (resulting in very large resistance and very low, practically zero, current)

(c) width becomes 1/e times the maximum possible width

(d) The width of the induced channel becomes zero and the current saturates

I got this question in an interview.

The question is from MOSFETs Device Strucuture and Physical Operation topic in chapter MOS Field Effect Transistors (MOSFETs) of Electronic Devices & Circuits

Answer 1

The correct choice is (d) The width of the induced channel becomes zero and the current saturates

To explain I would say: It is a characteristics of a channel pinch off.