For a common emitter transistor, if I E I C = 0.95 , then the current gain is

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Physics - Semiconductors Question with Solution | TestHub

PhysicsSemiconductorsTransistorEasy2 minPYQ_2025

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For a common emitter transistor, if $\frac{I _{C}}{I _{E}} = 0.95$ , then the current gain is

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Solution:

Given $\frac{I _{C}}{I _{E}} = 0.95$ .

This ratio represents the common base current gain, $α = 0.95$ .

The current gain for a common emitter transistor is given by $β = \frac{α}{1 - α}$ .

Substituting the value of $α$ :

$β = \frac{0.95}{1 - 0.95} = \frac{0.95}{0.05} = 19$ .

Answer: $19$

Stream:MHT_CETSubject:PhysicsTopic:SemiconductorsSubtopic:Transistor

⏱ 2mℹ️ Source: PYQ_2025

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