Amplifier Circuits – Definition
Amplifier circuit is an electronics circuit which input is low quality signal and gives output as strong signal. Commonly transistors are used for the process of amplification. Three combination of transistors are used as amplifier circuit are given below;
- Class-A Amplifier
- Class-B Amplifier
- Class-C Amplifier
Read More: MCQs of Basic Electronics Questions Test with Answer Key PDF
The aim is to provide MCQs on Amplifier Circuits objective questions and answers to understand how to understand the concept of amplifying technique. If you are willing to learn the concepts of Basic Electronics MCQs multiple choice questions with answer then read all the multiple choice questions and answers completely. You will be surely qualify for all kinds of Quiz / tests / Interviews after understanding the Introduction To Amplifier Circuit. If you are a students, technician or teacher then you can learn the basic concept of Amplification principle, function and applications.
MCQs on Amplifier Circuits (Objective Questions)
Q1. __________ circuits are used to increase/strong the input signal. .
- Inductor
- Capacitor
- Amplifier
- All are correct
Answer: c
Q2. Generally, the transistors are used for amplification process. True / False
Answer: True
Q3. Dc voltage in the transistor amplifier are used for___________.
- increasing gain
- current conduction
- coupling
- a & c are correct
Answer: a
Q4. The symbol of load impedance is ZL. True / False
Answer: True
Q5. The amount of DC supply voltages _____________are used for current conduction in transistor amplifier circuit.
- 4.5v
- 9v
- 28v
- all are correct
Answer: d
Q6. Higher the value of load impedance gives more amplifier signal at output. True / False
Answer: True
Q7. ______________ is used as load impedance in the amplifier circuit for amplified output signal.
- inductor
- resistor
- choke
- all are correct
Answer: d
Q8. When the emitter is grounded in the transistor amplifier then such type of combination is common emitter. True / False
Answer: True
Read More: Introduction To Wave Shaping Circuits MCQs
Q9. How many terminals any transistor have ?
- 2
- 3
- 4
- 1
Answer: b
Q10. Gain of the amplifier transistor is directly proportional to the amplified signal. True / False
Answer: True
Q11. The best combination of transistor is _________ for the current amplifier and voltage gain.
- common emitter
- common collector
- common base
Answer: a
Q12. Common Base (CB) circuit is infrequently used for amplification. True / False
Answer: True
Q13. When the base is grounded and output is taken from collector then which combination of transistor amplifier belongs it ?
- common base
- common emitter
- common collector
Answer: a
Q14. In the common collector combination, the output is taken from the collector. True / False
Answer: False (Emitter)
Q15. The Emitter Follower circuit is an another name of ______________.
- common base
- common emitter
- common collector
Answer: c
Q16. The voltage gain of common collector amplifier is less than 1. True / False
Answer: True
Q17. In the common collector combination, the low input base current results in ______________.
- high input impedance
- high output current
- low input impedance
- all are correct
Answer: d
Q18. Common Collector transistor is oftenly used for high input and low output impedance. True / False
Answer: True
Q19. The Common Emitter transistor combination is little used because of ______________.
- high input impedance
- low input impedance
- low output impedance
- high output impedance
Answer: b
Q20. Nonlinear devices such as Diode, Transistors are used in the non-linear wave shaping circuits. True / False
Answer: True
Q21. Common Collector is also called Emitter follower because of input and output are __________.
- inphase
- out of phase
Answer: a
Q22. A transformer may be used as load impedance. True / False
Answer: True
Q23. The voltage gain of single tuned amplifier is directly proportional to the amplifier ____________.
- load impedance
- resistance
- current
- a & b are correct
Answer: a
Q24. The biasing voltage on junction transistor is 0.6v for silicon and 0.2v for germanium in Class-A amplifier. True / False
Answer: True
Q25. The output current flows for the full cycle of 360° of the input signal ?
- Class-A Amplifier
- Class-B Amplifier
- Class-AB Amplifier
- Class-C Amplifier
Answer: a
Q26. Class-B amplifier requires more Dc biasing rather than Class-A. True / False
Answer: True
Q27. When the output flows for the 180° or approximately one half of the input is called_________.
- Class-B Amplifier
- Class-A Amplifier
- Class-C Amplifier
- Class-AB Amplifier
Answer: a
Q28. Class-C amplifier is used in tuned RF Power amplifiers. True / False
Answer: True
Q29. When output current flows for 120° to the input is called_________.
- Class-A Amplifier
- Class-B Amplifier
- Class-AB Amplifier
- Class-C Amplifier
Answer: d
Q30. Class-AB amplifier is used for Push Pull Audio Power amplifier. True / False
Answer: True
Q31. The operation of an amplifier mainly depends upon the requirement for ________________.
- minimum distortion
- efficiency
- maximum AC power
- all are correct
Answer: d
Q32. When the input signal waveshape becomes different from the input signal waveshape which is called ________________.
- distortion
- efficiency
- ratio
- amplifier
Answer: a