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Grade upto college level Engineering Entrance Exams

The current gain for a transistor working as common-base amplifier is 0.96. If the emitter current is 7.2 mA, then the base current is

(a) 0.29mA

(b) 0.35mA

(c) 0.39mA

(d) 0.43mA

Profile image of Amit Saxena
12 Years agoGrade upto college level
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1 Answer

Profile image of Aditi Chauhan
12 Years ago

(a)

Current gain (a) =0.96

        Ic = 0.96 × 7.2 mA = 6.91 mA

        Ic = Ic + Ib

     Ib = Ie – Ic = 7.2 - 6.91 = 0.29 mA


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