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How do we compute the current gain of a simplified CB amplifier model using hybrid parameters?

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How do we compute the current gain of a simplified CB amplifier model using hybrid parameters?

(a) -hfe / 1 + hfe

(b) -hfe / 1 – hfe

(c) hfe / 1 + hfe

(d) hfe / 1 – hfe

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Asked question is from Simplified Calculations for the CB Configuration in section Low Frequency Transistor Amplifier Circuit of Electronic Devices & Circuits

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The correct option is (c) hfe / 1 + hfe

Best explanation: The current gain of a simplified common base (CB) amplifier can be expressed in terms of approximate hybrid parameters. The current gain hfe is the forward transfer characteristics. The current gain of a common base amplifier is expressed as hfe / 1 + hfe.

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