FET and FET Amplifiers MCQs

Question 1

FET has offset voltage of about

Accepted Answer

zero

Answer

0.2 volt

Answer

0.6 volt

Answer

1.1 volt

Question 2

In a JFET, beyond the pinch off voltage, as the drain voltage increases; the drain current

Accepted Answer

remains almost constant

Answer

decreases

Answer

increases

Answer

may increases or decrease

Question 3

n-channel FETs are superior to p-channel FETs because

Accepted Answer

modility of charge carrier electron in n-channel FET is greater than the mobility of change carrier hole in p-channel FET

Answer

they have lower switchig time

Answer

they have lower pinch off voltage

Answer

they have higher input impedance

Question 4

The charge carriers in a p-channel FET are

Accepted Answer

holes alone

Answer

electrons alone

Answer

both electrons and holes

Answer

may be either electrons or holes

Question 5

The charge carriers in an n-channel FET are

Accepted Answer

electrons alone

Answer

holes alone

Answer

both electrons and holes

Answer

may be either electrons or holes

Question 6

When the gate-to-source vnlage VGS of an n-channel JET is made more and more negative, the drain current

Accepted Answer

decreases

Answer

increases

Answer

remains unchanged

Answer

may increases or decrease

Question 7

When the gate to source voltage V a p-channel JFET is made more positive, the drain current

Accepted Answer

decreases

Answer

increases

Answer

remains constant

Answer

may increase or decrease

Question 8

The input resistance of a JFET is of the order of

Accepted Answer

100 MO

Answer

1

Answer

10 kn.

Answer

10 MO

Question 9

The main drawback of a JFET is its

Accepted Answer

lower gain

Answer

high input impedance

Answer

low input impedance

Answer

higher noise