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JEE Main 2017 (9 Apr, Shift 1) · Junction Transistor

Junction Transistor question from JEE Main 2017 (9 Apr, Shift 1)

Q93JEE Main 2017 · 9 APR · SHIFT 1Medium

Junction Transistor

The current gain of a common emitter amplifier is 69. If the emitter current is 7.0 mA, collector current is:

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Answer: (b)

  1. α=β1+β=6970\alpha = \dfrac{\beta}{1+\beta} = \dfrac{69}{70}
  2. IC=αIE=6970×7.0=6.9I_C = \alpha I_E = \dfrac{69}{70} \times 7.0 = 6.9 mA.
  3. So the answer is (b) 6.9 mA.
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