Bipolar Junction Transistor MCQs

Question 1

When an NPN transistor is cut-off, its VCC

Accepted Answer

equals V lc is zero

Answer

equals V lc is high

Answer

is low and Ic is high

Answer

is high and lc is low

Question 2

If, in a bipolar junction transistor, IB = 100 ILA and lc = 10 mA, in what range does the value of its beta lie?

Accepted Answer

1.01 to 10

Answer

0.1 to 1.0

Answer

10.1 to 100

Answer

100.1 to 1000

Question 3

In a BJT, largest current flow occurs

Accepted Answer

in the emitter

Answer

in the collector

Answer

in the base

Answer

through CB junction

Question 4

In a properly-connected BJT, an increase in base current causes increase in

Accepted Answer

both Ic and IE

Answer

lc only

Answer

1E only

Answer

leakage current

Question 5

When a BJT operates in cut-off

Accepted Answer

VcE = Vcc

Answer

VcE = 0

Answer

VcE has negative value

Answer

lc is maximum

Question 6

When a BJT is in saturation

Accepted Answer

VcE = 0

Answer

lc = 0

Answer

IB controls lc

Answer

VcE has positive value

Question 7

A transistor is operated as a non-saturated switch to eliminate

Accepted Answer

storage time

Answer

turn-off time

Answer

turn-on time

Answer

delay time

Question 8

Early-effect in BJT refers to

Accepted Answer

base narrowing

Answer

avalanche break down

Answer

thermal break down

Answer

zener break-down

Question 9

A bipolar junction transistor (BJT) is used as power control switch by biasing it in the cut-off region (OFF state) or in the saturation region (ON state). In the ON state, for the BJT.

Accepted Answer

both the base-emitter and base-collector junctions are forward biased

Answer

both the base-emitter junction and base-collector junctions are reverse biased

Answer

the base-emitter is reverse biased, and the base-collector junction is forward biased

Answer

the base-emitter junction is forward biased, and the base-collector junction is reverse biased