Explore topic-wise MCQs in Electronics.

This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Electronics knowledge and support exam preparation. Choose a topic below to get started.

1.

A bipolar junction transistor has ____ regions of operation.

A. 1
B. 2
C. 3
D. 4
Answer» C. 3
Discussion
2.

The polarity of V is such that it reverse biases the base-emitter junction.

A. True
B. False
Answer» C.
Discussion
3.

The signal voltage gain of an amplifier, A, is defined as __________.

A. A
B. = I
C. x R
Answer» B. = I
Discussion
4.

V approximately equals ________ when a transistor switch is in saturation.

A. V
B. V
C. 0.3 V
D. 0.7 V
Answer» D. 0.7 V
Discussion
5.

V approximately equals ________ when a transistor switch is cut off.

A. V
B. V
C. 0.2 V
D. 0.7 V
Answer» B. V
Discussion
6.

A transistor has a of 250 and a base current, I, of 20 A. The collector current, I, equals:

A. 500
B. A
C. 5 mA
D. 50 mA
E. 5 A
Answer» C. 5 mA
Discussion
7.

A current ratio of I/I is usually less than one and is called:

A. beta
B. theta
C. alpha
D. omega
Answer» D. omega
Discussion
8.

If an input signal ranges from 20–40 A (microamps), with an output signal ranging from .5–1.5 mA (milliamps), what is the ac beta?

A. 0.05
B. 20
C. 50
D. 500
Answer» D. 500
Discussion
9.

The symbol h is the same as:

A. hi-fi
Answer» B.
Discussion
10.

When a silicon diode is forward biased, what is V for a C-E configuration?

A. voltage-divider bias
B. 0.4 V
C. 0.7 V
D. emitter voltage
Answer» D. emitter voltage
Discussion
11.

What is the current gain for a common-base configuration where I = 4.2 mA and I = 4.0 mA?

A. 16.80
B. 1.05
C. 0.20
D. 0.95
Answer» E.
Discussion
12.

If V = +18 V, voltage-divider resistor R is 4.7 k, and R is 1500, what is the base bias voltage?

A. 8.70 V
B. 4.35 V
C. 2.90 V
D. 0.7 V
Answer» C. 2.90 V
Discussion