Power gain for common base amplifier is 400 and voltage gain is 420 . Find the collector current (in mA ) when base current is 100 μA .

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Question: Answered & Verified by Expert

Power gain for common base amplifier is

400

and voltage gain is

420

. Find the collector current (in

mA

) when base current is

100 μA

.

PhysicsSemiconductorsJEE Main

Solution:

2271 Upvotes Verified Answer

The correct answer is: 02.00

A_{p} = α A_{v}

\Rightarrow 400 = α \times 420

\Rightarrow α = \frac{40}{42} = \frac{20}{21}

\Rightarrow β = 20

And,

l_{c} = β \times l_{b} = 2 mA

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