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Wave Optics

Question
CBSEENPH12039938

A transistor is operated in common emitter configuration VC = 2V such that change n the base current from 100 µA to 300 µA produces a change in the collector current from 10 mA to 20 mA. The current gain is

  • 75

  • 100

  • 25

  • 50

Solution

A.

75

straight beta space equals space fraction numerator increment straight l subscript straight C over denominator increment straight I subscript straight B end fraction space equals space fraction numerator left parenthesis 20 space minus space 10 space right parenthesis space mA over denominator left parenthesis 300 space minus space 100 right parenthesis space mA end fraction
space equals space fraction numerator 10 space straight x space 10 to the power of negative 3 end exponent over denominator 200 space straight x space 10 to the power of negative 6 end exponent end fraction space equals space 50

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