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Physics - Semiconductors Question with Solution | TestHub

PhysicsSemiconductorsTransistorMedium2 minPYQ_2023

PhysicsMediumsingle choice

In an n-p-n transistor, the collector current is $28 mA$ . If $80%$ of electrons reach the collector, its base current in $mA$ is

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Solution:

It is given that $80% I_{e} = I_{c} = 28 mA$ $∴ \frac{80}{100} I_{e} = 28 mA \Rightarrow I_{e} = 35 mA But, I_{e} = I_{c} + I_{B} ∴ I_{B} = I_{e} - I_{c} \Rightarrow I_{B} = 35 - 28 = 7 mA$

Stream:MHT_CETSubject:PhysicsTopic:SemiconductorsSubtopic:Transistor

⏱ 2mℹ️ Source: PYQ_2023

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