Explore topic-wise MCQs in Electronic Devices and Circuits Questions and Answers.

This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Electronic Devices and Circuits Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.

1.

The circuit shown below is a small sine wave signal with average zero. For R (L) = 10 kΩ and transistor Ro = 200 kΩ, determine the overall voltage gain.

A. -21 V/V
B. -42 V/V
C. -86 V/V
D. -123 V/V
Answer» D. -123 V/V
Discussion
2.

The circuit shown below is a small sine wave signal with average zero and transistor ß. Find R(C) to establish a dc collector voltage of about +5V.

A. 5 kΩ
B. 10 kΩ
C. 15 kΩ
D. 20 kΩ
Answer» E.
Discussion
3.

The circuit shown below is a small sine wave signal with average zero and transistor ß. Find the value of R(E) to establish a dc emitter current of about 0.5 mA.

A. 28.57 kΩ
B. 57.04 kΩ
C. 114.08 kΩ
D. 228.16 kΩ
Answer» B. 57.04 kΩ
Discussion
4.

An amplifier is measured to have an internal resistance of 10 kΩ, voltage gain of 100V/V and output resistance of 100 Ω. Also, when a load resistance of 1 kΩ is connected between the output resistance if found to decrease to 8 kΩ. If the amplifier is fed with the signal source having an internal resistance of 2 kΩ. Find Ai.

A. 182 A/A
B. 364 A/A
C. 546 A/A
D. 728 A/A
Answer» E.
Discussion
5.

An amplifier is measured to have an internal resistance of 10 kΩ, voltage gain of 100V/V and output resistance of 100 Ω. Also, when a load resistance of 1 kΩ is connected between the output resistance if found to decrease to 8 kΩ. If the amplifier is fed with the signal source having an internal resistance of 2 kΩ. Find R out.

A. 146 Ω
B. 292 Ω
C. 584 Ω
D. 1168 Ω
Answer» B. 292 Ω
Discussion
6.

An amplifier is measured to have an internal resistance of 10 kΩ, voltage gain of 100V/V and output resistance of 100 Ω. Also, when a load resistance of 1 kΩ is connected between the output resistance if found to decrease to 8 kΩ. If the amplifier is fed with the signal source having an internal resistance of 2 kΩ. Find Gv.

A. 53.4 V/V
B. 72.7 V/V
C. 83.3 V/V
D. 90.9 V/V
Answer» C. 83.3 V/V
Discussion
7.

An amplifier is measured to have an internal resistance of 10 kΩ, voltage gain of 100V/V and output resistance of 100 Ω. Also, when a load resistance of 1 kΩ is connected between the output resistance if found to decrease to 8 kΩ. If the amplifier is fed with the signal source having an internal resistance of 2 kΩ. Find Gvo.

A. 53.3 V/V
B. 63.3 V/V
C. 73.3 V/V
D. 83.3 V/V
Answer» E.
Discussion
8.

An amplifier is measured to have an internal resistance of 10 kΩ, voltage gain of 100V/V and output resistance of 100 Ω. Also, when a load resistance of 1 kΩ is connected between the output resistance if found to decrease to 8 kΩ. If the amplifier is fed with the signal source having an internal resistance of 2 kΩ. Find Av.

A. 9.09 V/V
B. 10 V/V
C. 90.9 V/V
D. 100 V/V
Answer» D. 100 V/V
Discussion
9.

An amplifier is measured to have an internal resistance of 10 kΩ, voltage gain of 100V/V and output resistance of 100 Ω. Also, when a load resistance of 1 kΩ is connected between the output resistance if found to decrease to 8 kΩ. If the amplifier is fed with the signal source having an internal resistance of 2 kΩ. Find Gm.

A. 1 A/V
B. 10 A/V
C. 100 A/V
D. 1000 A/V
Answer» B. 10 A/V
Discussion