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The ratio of the short circuit current gain of a current amplifier (Ai) to the open circuit voltage gain of a voltage amplifier (AV), given that both amplifiers have the same value of the input resistance (Ri) and output resistance (R0), is

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The ratio of the short circuit current gain of a current amplifier (Ai) to the open circuit voltage gain of a voltage amplifier (AV), given that both amplifiers have the same value of the input resistance (Ri) and output resistance (R0), is

(a) Ri

(b) Ro

(c) Ri / R0

(d) Ro / Ri

The question was posed to me in homework.

Asked question is from Circuit Models for Amplifier in section Signals and Amplifiers of Electronic Devices & Circuits

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Right answer is (c) Ri / R0

The explanation is: It is a standard mathematical relation.

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