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Electronic Devices & CircuitsBJT

The Early effect in a BJT refers primarily to variation of collector current with collector-emitter voltage due to?

  • ABase-width modulation
  • BGate-oxide tunneling
  • CZener regulation
  • DEmitter resistance only
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Correct Answer: A. Base-width modulation
Explanation: Increasing collector-base reverse bias widens the depletion region into the base, reducing effective base width and changing collector current; this is the Early effect.
Reference: Standard transistor electronics: Early effect
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