FET and FET Amplifiers MCQs

Question 1

Which of the following device has the highest input impedance

Accepted Answer

CC BJT

Answer

CE BJT

Answer

JFET

Answer

MOSFET

Question 2

A field-effect transistor (FET)

Accepted Answer

depends on the variation of a reverse voltage its operation

Answer

has three pn junctions

Answer

uses a forward biased junction

Answer

depends on the variation of a magnetic field for its operation

Question 3

The operation of a JFET involves

Accepted Answer

flow of majority carriers alone

Answer

flow of minority carriers alone

Answer

flow of both minority and majority carriers

Answer

use of a magnetic field

Question 4

The input impedance (Zi) and.the output impedance (Z0) of an ideal transconductance (voltage contikolled current source) amplifier are

Accepted Answer

Z1= D., Zo =d

Answer

Z, = 0, Z0 = 0

Answer

Zi = 0, Zo =

Answer

Z1 = co, Zo = 0

Question 5

In a transconductance, amplifier, it is desirable to have

Accepted Answer

a large input resistance and a large output resistance

Answer

a large input resistance and a small output resistance

Answer

a small input resistance and a large output resistance

Answer

a small input resistance and a small output resistance