This set of Electronic Devices and Circuits Multiple Choice Questions & Answers (MCQs) focuses on “High Input Resistance Transistor Circuit”.
1. Which of the following have high input resistance transistor circuits?
a) Common collector
b) Common base
c) Feedback amplifier
d) Power amplifier
View Answer
Explanation: The common collector amplifier circuit is one of the most noticeable high input resistance transistor circuits. In most applications, along with CC configuration the common emitter also generally has a high input resistance.
2. What is the other name for a high input resistance transistor amplifier circuit amplifier configuration?
a) Common collector
b) Common base
c) Common emitter
d) Amplifier circuit
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Explanation: The high input resistance transistor amplifier circuit configuration is also known as the common collector configuration as it provides a high input impedance and a low output impedance. The high input resistance transistor amplifier circuit acts as a middle stage.
3. How is the current gain of a high input resistance transistor amplifier circuit amplifier?
a) Irrelevant
b) Moderate
c) Low
d) High
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Explanation: The construction of a high input resistance transistor amplifier circuit is approximately similar to a normal amplifier. One of the most important differentiating feature of a high input resistance transistor amplifier circuit is its high current gain.
4. How is the output impedance of a high input resistance transistor amplifier circuit?
a) Irrelevant
b) Moderate
c) Low
d) High
View Answer
Explanation: The construction of a high input resistance transistor amplifier circuit is approximately similar to a normal amplifier. One of the most important differentiating feature of a high input resistance transistor amplifier circuit is its low output impedance.
5. What is the application of a high input resistance transistor amplifier circuit amplifier?
a) Positive feedback
b) Voltage gain
c) Power gain
d) Impedance matching
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Explanation: The high input impedance and resistance along with low output impedance makes the transistor amplifier circuit amplifier ideal for impedance matching. Along with that, its key characteristics include a comparatively high current and power gain.
6. What type of negative feedback does a high input resistance transistor amplifier circuit amplifier provide?
a) Voltage, current and power
b) Voltage
c) Current
d) Power
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Explanation: A high input resistance transistor amplifier circuit configuration is prominently known for its feedback amplifier qualities. It is a negative feedback network that provides a negative feedback of current to the circuit. It is generally used in the last stage of an amplifying network.
7. How is the power gain of a high input resistance transistor amplifier circuit amplifier?
a) Irrelevant
b) Moderate
c) Low
d) High
View Answer
Explanation: The construction of a high input resistance transistor amplifier circuit is approximately similar to a normal amplifier. One of the most important differentiating feature of a high input resistance transistor amplifier circuit is its high power gain.
8. What is the value of β in a high input resistance transistor amplifier circuit amplifier if Vf = 7V and VO = 6.89V?
a) 1
b) 1.12
c) 1.4
d) 0.124
View Answer
Explanation: The value of β in a high input resistance transistor amplifier circuit amplifier configuration can be calculated using β = Vf / VO. Given, Vf = 7V and VO = 6.89V:
β = Vf / VO = 7 / 6.89 = 1.01 ≈ 1.
9. What is the voltage gain of a high input resistance transistor amplifier circuit amplifier?
a) 1
b) β
c) ∞
d) 0
View Answer
Explanation: The voltage gain of a high input resistance transistor amplifier circuit amplifier configuration is roughly equal to unity. AV is approximately equal to 1. This is due to the relatively high input impedance and low output impedance.
Sanfoundry Global Education & Learning Series – Electronic Devices and Circuits.
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