Correct option is C
The Early effect in a BJT refers to "Base narrowing".
Explanation: The Early effect occurs when a large reverse bias voltage is applied to the collector-base junction, causing the depletion region to extend further into the base region, effectively narrowing the base width and increasing the collector current.
Key points about the Early effect:
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Cause: High reverse bias on the collector-base junction.
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Result: Reduced effective base width.
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Impact on current: Increases the collector current.
