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Physics - Semiconductors Question with Solution | TestHub

PhysicsSemiconductorsTransistorEasy2 minPYQ_2020

PhysicsEasysingle choice

In common emitter mode of transistor, the d.c. current gain is 20 , the emitter current is $7 mA$ . The collector current is

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Solution:

$β = \frac{I _{C}}{I _{B}} = 20$ $\frac{I _{C}}{I _{E} - I _{C}} = 20 \frac{I _{E} - I _{C}}{I _{C}} = \frac{1}{20}$ $\frac{I _{E}}{I _{C}} - 1 = \frac{1}{20} \frac{I _{E}}{I _{C}} = \frac{1}{20} + 1 = \frac{21}{20}$ $I_{C} = \frac{20}{21} \times 7 = \frac{20}{3} mA$

Stream:MHT_CETSubject:PhysicsTopic:SemiconductorsSubtopic:Transistor

⏱ 2mℹ️ Source: PYQ_2020

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