Bipolar Junction Transistor MCQs

Question 1

The dc load line of a transistor circuit

Accepted Answer

has a negative slope

Answer

is a curved line

Answer

gives graphic relation between IC and 1B

Answer

does not contain the Q-point

Question 2

The positive swing of the output signal in a trnasistor circuit start clipping first when Q-point of th circuit moves

Accepted Answer

towards the cut-off point

Answer

to the centre of the load line

Answer

two-third way up the load line

Answer

towards the saturation point

Question 3

To avoid thermal run away in the design of analog circut, the operating point of the BJT should be such that it satisfies the condition

Accepted Answer

VcE > 1/2 V

Answer

VcE = 1/2 V

Answer

VcE < 1/2 Vcc

Answer

VcE < 0.78 Vcc

Question 4

In the case of a BJT amplifier, bias stability is achieved by

Accepted Answer

keeping the base current constant

Answer

changing the base current in order to keep the lc and V

Answer

keeping the temperature constant

Answer

keeping the temperature and the base current constant

Question 5

For a transistor amplifier with self-biasing network, the following components are used : R1 = 4 Ica, R2 = 4 kr/ and RE = 1 Ica the approximate value of the stability factor `S' will be

Accepted Answer

3

Answer

4

Answer

2

Answer

1.5

Question 6

A transistor circuit employing base bias with collector feedback has greater stability than the one without feedback because

Accepted Answer

VBE is decreased

Answer

lc decrease in magnitude

Answer

of negative feedback effect

Answer

lc becomes independent of f3.

Question 7

The universal bias stabilization circuit is most popular because

Accepted Answer

Ic does not depend on transistor characteristics

Answer

its 13-sensitivity is high

Answer

voltage divider is heavily loaded by transistor base

Answer

lc equals IE.

Question 8

Improper biasing of a transistor circuit leads to

Accepted Answer

distortion in output signal

Answer

excessive heat production at collector terminal

Answer

faulty location of load line

Answer

heavy loading of emitter terminal

Question 9

The negative output swing in a transistor circuit starts clipping first when Q-point

Accepted Answer

is near saturation point

Answer

has optimum value

Answer

is near cut-off point

Answer

is in the active region of the load line.