A change of 8 . 0 mA in the emitter current brings a change of 7 . 9 mA in the collector current. The values of α a n d β are

Question

A change of 8 . 0 mA in the emitter current brings a change of 7 . 9 mA in the collector current. The values of α a n d β are, 0 . 99 , 90, 0 . 96 , 79, 0 . 97 , 99, 0 . 99 , 79

MARKS App · Accepted Answer

Given that, change in emitter current, ∆ I E = 8 mA And the change in collector current, ∆ I C = 7.9 mA We know that, α = ∆ I C ∆ I E ⇒ α = 7.9 8 ⇒ α ≈ 0.99 Also, we know that β = α 1 - α ⇒ β = 7.9 8 1 - 7.9 8 ⇒ β = 7.9 8 - 7.9 ⇒ β = 7.9 0.1 = 79 Hence, α = 0.99 a n d β = 79

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