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Common Collector Amplifier Question & Answers

October 20, 2022 By WatElectronics

This article lists 30 Common Collector Amplifier MCQs for engineering students. All the Common Collector Amplifier Questions & Answers given below include a hint and a link wherever possible to the relevant topic. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up on the fundamentals of Common Collector Amplifier.     

In emitter follower or common collector amplifiers, the emitter terminal serves as the output and the base terminal serves as an input. The collector is common in emitter-follower circuits, and these circuits are typically used as a voltage buffer. 

In common collector amplifiers, the voltage gain is less than one and the current gain is greater than one, hence the common collector doesn’t do any voltage amplification. The input and output in phase, high power gain, low output, and high input impedances are the characteristics of common collector amplifiers. 

The features of common collector amplifiers are moderate/high input impedance, low output impedance, low (unity) voltage gain, and high current gain. The output in the common collector amplifiers is measured at the emitter terminal. 

The common collector amplifiers are used in wideband buffer amplifiers to drive low imped/Xc loads, used as switching circuits, and also used in digital circuits with logic gates. The other name of common collector amplifiers is also called voltage follower or emitter follower. 

1). In which one of the following configuration voltage gains is greater than one?

Hint
2). In which one of the following configurations the input resistance is high?

Hint
3). In emitter follower or common collector, the output resistance is ________________?

Hint
4). In which one of the following amplifiers, the phase shift is zero degrees?

Hint
5). The leakage current is very large in _________ configurations?

Hint
6). Which one of the following configurations used for impedance matching?

Hint
7). The input voltage in common emitter amplifiers applied between _________________?

Hint
8). The voltage gain is about 150 in _______________ amplifier configuration?

Hint
9). The figure shown below is a circuit diagram of ________________ amplifier?

Common Collector Configuration

Hint
10). In which one of the following configurations, the output resistance is moderate to high?

Hint

Common Collector Amplifier MCQ for Quiz

11). In which one of the following amplifiers, the power gain is low?

Hint
12). The voltage gain is about 500 in _______________ amplifier configuration?

Hint
13). In which one of the following amplifiers, the input impedance is 1k?

Hint
14). The output impedance is 50k in ________________ amplifier configuration?

Hint
15). Which one of the following is very high in common collector amplifiers?

Hint
16). When output current is divided by input current then that is a formula of ______________?

Hint
17). The figure shown below is a curve of ________________ amplifier?

Common Collector Input Characteristic Curve

Hint
18). The (Vg-Vi)/Rg is the equation to calculate________ parameter?

Hint
19). The input voltage in common base amplifiers applied between _________?

Hint
20). Which one of the following configurations used for high frequency applications?

Hint

Common Collector Amplifier MCQ for Exams

21). In which one of the following amplifiers the input impedance is 50 ohms?

Hint
22). Which one of the following is low in common collector amplifiers?

Hint
23). In which one of the following configurations, the output impedance is 300 ohms?

Hint
24). In which one of the following amplifiers the input impedance is 300k?

Hint
25). Which one of the following configurations used for audio frequency applications?

Hint
26). The output impedance is 1 Meg in ________________ amplifier configuration?

Hint
27). When output voltage is divided by input voltage then that is a formula of ______________?

Hint
28). The figure shown below is a curve of ________________ amplifier?

Common Collector Output Characteristic Curve

Hint
29). In which one of the following configurations, the voltage gain is less than unity?

Hint
30). The input voltage in common collector amplifiers applied between _________________?

Hint
Read more about Amplifiers 

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