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Change in base or collector current using the current gain

This type of question, asked 3 times: 15 May 2023 S1, 23 Apr 2025 S1, 13 Apr 2026 S2. All 3 questions below, oldest first.

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  1. Question 1

    15 May 2023 S1

    41
    For a transistor, current gain (β)=50(\beta) = 50. To change the collector current by 350 μA350\,\mu\text{A}, the base current should be changed by

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  2. Question 2

    23 Apr 2025 S1

    15
    In a common emitter transistor amplifier circuit, the current gain α=0.8\alpha= 0.8. If the base current changes by 3μ A3\mu\text{ }A then the collector current changes by

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  3. Question 3

    13 Apr 2026 S2

    149
    If transistor having α=0.9\alpha = 0.9, is used in CE configuration, then for a change of 0.40.4 mA in base current, what will be the change in collector current?

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