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A common base transistor amplifier has an input resistance of 20Ω and output resistance of 100kΩ. If a signal of 400mV is applied between emitter and base, find the voltage amplification. Assume αac to be one.
  • a)
    20
  • b)
    50
  • c)
    30
  • d)
    25
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
A common base transistor amplifier has an input resistance of 20 and o...
Clarification:
IE = V/R = 400M/20 = 20mA
I= αIE= 1 x 20mA = 20mA.
V= IC x R= 20m x 1k = 20V
Amplification,
A =  VO/signal voltage = 20V/400m = 50.
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A common base transistor amplifier has an input resistance of 20 and output resistance of 100k. If a signal of 400mV is applied between emitter and base, find the voltage amplification. Assume αac to be one.a)20b)50c)30d)25Correct answer is option 'B'. Can you explain this answer?
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