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Electronic Devices & CircuitsBJT

The relation between common-base current gain alpha and common-emitter current gain beta is?

  • Abeta = 1 - alpha
  • Bbeta = alpha/(1-alpha)
  • Cbeta = (1-alpha)/alpha
  • Dbeta = 1/alpha
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Correct Answer: B. beta = alpha/(1-alpha)
Explanation: Using alpha = IC/IE and beta = IC/IB with IE = IC + IB gives beta = alpha/(1-alpha).
Reference: Standard transistor electronics: alpha-beta relation
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