FET and FET Amplifiers MCQs

Question 1

The best electronic device for fast switching is

Accepted Answer

MOSFET

Answer

BJT

Answer

triode

Answer

JFET

Question 2

Which semi-conductor deviceacts like a diode and two resistors?

Accepted Answer

UJT

Answer

SCR

Answer

triac

Answer

diac

Question 3

An SCR is a semiconductor device made up of

Accepted Answer

two P-type and two N-type layers

Answer

four N-type layers

Answer

two P-type and three N-type layers

Answer

three P-type and one N-type layer

Question 4

An SCR conducts appreciable current when

Accepted Answer

anode and gate are both positive with respect to cathode

Answer

anode and gate are both negative with respect to cathode

Answer

anode is negative and gate is positive with respect to cathode

Answer

gate is negative and anode is positive with respect to cathode

Question 5

After firing an SCR, the gating pulse is removed. The current in the SCR will

Accepted Answer

remain the same

Answer

immediately fall to zero

Answer

rise up

Answer

rise a little and then fall to zero

Question 6

Which device acts like an NPN and a 'PNP transistor connected base-to-base and emitter-to-collector?

Accepted Answer

SCR

Answer

triac

Answer

UJT

Answer

disc

Question 7

An SCR may be considered to be ? diode back-to-back consisting of an anode, cathode and ?

Accepted Answer

3, gate

Answer

2, plate

Answer

3, plate

Answer

4, base

Question 8

An SCS has

Accepted Answer

one anode, one cathode and two gates

Answer

four layers and three terminals

Answer

three layers and four terminals

Answer

two anodes and two gates

Question 9

An SCS may be switched ON by a

Accepted Answer

positive pulse at its cathode gate 02

Answer

positive pulse at its anode

Answer

negative pulse at its cathode

Answer

positive pulse at its anode gate 01