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What is the purpose of using ann-stage cascading transistor amplifier?

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What is the purpose of using ann-stage cascading transistor amplifier?

(a) Increase voltage gain

(b) Decrease voltage gain

(c) Increase current gain

(d) Decrease current gain

I have been asked this question during an interview.

My question is based upon N-Stage Cascading Amplifiers in section Low Frequency Transistor Amplifier Circuit of Electronic Devices & Circuits

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Correct answer is (a) Increase voltage gain

Easy explanation: A circuit having a single transistor amplifier does not provide suitable bandwidth or gain. The purpose of an n-stage cascading amplifier is to provide an increase in the voltage gain. The total gain of ann-stage cascading amplifier is the product of the voltage gains of the discrete stages.

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