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Which of the following have high input resistance transistor circuits?

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Which of the following have high input resistance transistor circuits?

(a) Common collector

(b) Common base

(c) Feedback amplifier

(d) Power amplifier

I have been asked this question by my school principal while I was bunking the class.

I need to ask this question from High Input Resistance Transistor Circuit topic in division Low Frequency Transistor Amplifier Circuit of Electronic Devices & Circuits

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Right choice is (a) Common collector

The 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.

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