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Voltage gain of a CE amplifier from current gain, load resistance and input resistance

The same question, asked 3 times: 3 May 2023 S1*, 19 Apr 2025 S2*, 20 Apr 2026 S1. Every wording below, oldest first.

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  1. Question 1

    3 May 2023 S1

    44
    In common emitter transistor amplifier, load resistance is 6.5 kΩ6.5\ \text{k}\Omega and input resistance is 1.3 kΩ1.3\ \text{k}\Omega. If current gain is 78, the voltage gain is

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  2. Question 2

    19 Apr 2025 S2

    45
    In a transistor amplifier, AC current gain is 64, the load resistance is 5400Ω5400\Omega and the input resistance of the transistor is 540Ω540\Omega. The voltage gain is

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  3. Question 3

    20 Apr 2026 S1

    149
    In a common emitter transistor amplifier, AC current gain is 6565, the load resistance is 5400 Ω5400\,\Omega and input resistance of the transistor is 450 Ω450\,\Omega. The voltage gain is

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