Question

The variation of the threshold voltage with the applied bulk-to-source voltage is typically observed by plotting the _________________ as a function of the source-to-drain voltage.

(a) drain current

(b) square root of the drain current

(c) square of the drain current

(d) natural logarithm of the drain current

This question was posed to me during an online exam.

My question comes from The Body Effect in portion MOS Field Effect Transistors (MOSFETs) of Electronic Devices & Circuits

Answer 1

Right option is (b) square root of the drain current

Best explanation: The change in threshold current is directly proportional to the square root of the drain current. For further assistance check the mathematical expression for the same.