FET and FET Amplifiers MCQs

Question 1

The input impedance of a MOSFET is of the order of

Accepted Answer

several M

Answer

f at constant VGs

Answer

a few hundred SI

Answer

k S at constant fps i

Question 2

The transconductance of a JFET ranges from

Accepted Answer

0.5 to 30 mAN

Answer

100 to 500 mAN

Answer

500 to 1000 mAN

Answer

above 1000 mAN

Question 3

The source terminal of a JFET corresponds to __ of a vacuum tube.

Accepted Answer

cathode

Answer

plate

Answer

grid

Answer

none of the above

Question 4

If the cross-sectional area of the channel in n-channel JFET increases, the drain current

Accepted Answer

is increased

Answer

is decreased

Answer

remains the same

Answer

none of the above

Question 5

For VGs = 0 V, the drain current becomes constant when YDS exceeds

Accepted Answer

Vp

Answer

cut off

Answer

VDD

Answer

0 V

Question 6

A certain JFET data sheet gives VGS(off) =-4 V. The pinch-off voltage VP is

Accepted Answer

+4 V

Answer

-4 V

Answer

dependent on VGs

Answer

data insufficient

Question 7

The constant-current region of a JFET lies between

Accepted Answer

pinch-off and breakdown

Answer

cut off and saturation

Answer

cut off and pinch-off

Answer

0 and iGss

Question 8

At cut-off, the JFET channel is

Accepted Answer

completely closed by the depletion region

Answer

at its widest point

Answer

extremely narrow

Answer

reverse biased

Question 9

If a = 0.995, 1 E = 10 mA and Ito = 0.5 ma, then IcED will be

Accepted Answer

100 RA

Answer

25 IAA

Answer

10.1 RA

Answer

10.5 pA