Explore topic-wise MCQs in Electronic Devices and Circuits.

This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Electronic Devices and Circuits knowledge and support exam preparation. Choose a topic below to get started.

1.

The units of voltage gain is

A. It has no units, it is a ratio
B. Decibels (db)
C. All of the mentioned
D. None of the mentioned
Answer» B. Decibels (db)
Discussion
2.

An amplifier has a voltage gain of 100 V/V and a current gain of 1000A/A. the value of the power gain decibel is

A. 30 db
B. 40 db
C. 50 db
D. 60 db
Answer» D. 60 db
Discussion
3.

Which of the following isn t true?

A. Both transformer and amplifier can provide voltage gain
B. Both transformer and amplifier can provide current gain
C. Both transformer and amplifier can provide power gain
D. None of the mentioned
Answer» D. None of the mentioned
Discussion
4.

Statement 1: Voltage gain of -5 means that the output voltage has been attenuated.
Statement 2: Voltage gain of -5db means that the output voltage has been attenuated.

A. Statement 1 and Statement 2 are true
B. Statement 1 and Statement 2 are false
C. Only Statement 1 is true
D. Only Statement 2 is true
Answer» E.
Discussion
5.

An amplifier operating from 3V provide a 2.2V peak sine wave across a 100 ohm load when provided with a 0.2V peak sine wave as an input from which 1.0mA current is drawn. The average current in each supply is measured to be 20mA. What is the amplifier efficiency?

A. 20.2%
B. 25.2%
C. 30.2%
D. 35.2%
Answer» B. 25.2%
Discussion