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  • A transistor is used in an amplifier circuit in common emitter mode. If the base current changes by it brings

A transistor is used in an amplifier circuit in common emitter mode. If the base current changes by 100 \mu \mathrm{A}, it brings a change of 10 \mathrm{~mA} in collector current. If the load resistance is 2 \mathrm{k} \Omega and input resistance is 1 \mathrm{k} \Omega, the value of power gain is x \times 10^{4}. The value of \mathrm{x} is______________.

Option: 1

2


Option: 2

1


Option: 3

4


Option: 4

3


Answers (1)

best_answer

\mathrm{\text { Power gain }=\left [ \frac{\Delta I_{c}}{\Delta I_{B}} \right ]^{2}\times \frac{R_{o}}{R_{i}} }

                         \mathrm{=\left [ \frac{10^{-2}}{10^{-4}} \right ]^{2}}\times \frac{2}{1}

                          \mathrm{=2\times 10^{4}}

                           \mathrm{X=2}

Hence correct answer is 2

Posted by

Pankaj Sanodiya

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