AP EAMCET202119 Aug 2021Morning ShiftPhysicsSemiconductorsActual
A transistor is connected in common emitter configuration. The collector supply is 8 V and the voltage drop across a resistor of 800 Ω in the collector circuit is 0 . 5 V . If the current gain factor α is 0 . 96 , the base current is
Options
- A2.6 × 10 − 5 A
- B3.6 × 10 − 5 A
- C5.6 × 10 − 5 A
- D6.6 × 10 − 5 A
Correct answer
A. 2.6 × 10 − 5 A
Step-by-step solution
For a common emitter configuration, collector current is I C I C = 0 . 5 800 = 0 . 625 × 10 - 3   A   ;   α = I C I E Now, I B = I E - I C I B = I C α - I C = I C 1 α - 1 I B = 26 × 10 - 6   A