What is Differential Amplifier (Definition)
A differential amplifier is a type of Operational Amplifier. It consists of two inputs and two outputs. The transistors are connected in a common emitter mode for the differential process. The differential amplifier is also known as a difference amplifier. When the two signals are applied to the input of Differential Amplifiers, then it gives an output of the difference of input. It has a very high gain. The biasing stability is also good. The output impedance is low, but the input impedance is high. All the MCQs on Differential Amplifier Questions and Answers are published according to the new study syllabus for the academic year 2021-22. The four modes of signal operations used for Differential amplifiers are given below;
- Single Ended Differential Amplifier
- Differential Input
- Common Mode Input
- Common Mode Gain
Read More: MCQs on Amplifier Circuits Objective Questions
The aim is to provide MCQs on Difference Amplifier 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 Differential Amplifier. If you are a students, technician or teacher then you can learn the basic concept of Amplification principle, function and applications.
Differential Amplifier MCQs (Questions and Answers Quiz)
Q1. Differential Amplifier consists of _________ transistors.
- One
- Two
- Three
- Four
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Answer: Two
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Q2. Differential amplifier has two inputs and two outputs. True / False
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Answer: True
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Q3. The _________amplifier configuration used for Differential amplifier.
- Common Emitter
- Common Base
- Common Collector
- Emitter Follower
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Answer: a
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Q4. In the Differential amplifier, the emitters of two CE Amplifiers are directly coupled. True / False
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Answer: True
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Q5. The bias stability of differential amplifier is _________.
- Good
- Bad
- Worse
- None is correct
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Answer: b
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Q6. Differential Amplifier has no drift problem (Zero-Drift). True / False
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Answer: True
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Q7. The gain of Differential Amplifier is _________.
- High
- Low
- Infinity
- Zero
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Answer: a
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Q8. The bypass capacitor is not used in Differential Amplifier. True / False
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Answer: True
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Read More: MCQs on OP AMP (Operational Amplifier) Questions and Answers
Q9. The Input Impedance of Differential Amplifier is ________.
- Low
- High
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Answer: b
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Q10. The output impedance of differential amplifier is low. True / False
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Answer: True
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Q11. The differential amplifier is used in OP AMP as _________.
- Output
- Input
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Answer: b
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Q12. Differential Amplifier is used where thermal stability and high gain required. True / False
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Answer: True
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Q13. In the single ended differential amplifier, the one _______ is grounded and another _______ is used.
- output, output
- input, input
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Answer: b
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Read More: MCQs on History of Electronics Questions and Answers
Q14. When the two out-of-phase signals applied to the input of Differential amplifier then it is called Differential input operation. True / False
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Answer: True
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Q15. When two In-phase signals applied to the Differential amplifier then the mode is called __________ .
- Common Mode Input
- Real Mode Input
- Common Mode Gain
- All are correct
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Answer: a
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Q16. CMRR stands for _________________________.
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Answer: Common Mode Rejection Ratio
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Q17. The differential amplifier formula is ___________.
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Answer: Vout = A (V1 – V2)
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Q18. The formula of CMRR is ___________.
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Answer: CMRR = Differential Voltage Gain (Avd) / Common Mode Gain (Acm)
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Q19. When all the values of Resistors used in Differential amplifier are same then it becomes Unity Gain Differential Amplifier. True / False
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Answer: True
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