Question
A transistor is connected in common-emitter (CE) configuration. The collector supply is 8 ~V and the voltage drop across a resistor is 500 in the collector circuit is 0.6 ~V . If the current gain factor is 0.96, find the base current
BITSAT
Physics
Semiconductors
2022
BITSAT 2022
BITSAT Physics Question (2022) — Solution
Options
- A. 25 A
- B. 50 A
- C. 20 A
- D. 35 A
Answer
B. 50 A
Step-by-step solution
Given, V_ C C =8 ~V Voltage drop, V_0= I_C R_L=0.6 ~V Load Resistor, R_L=500 Gain factor, =0.96 = 1- = 0.96 1-0.96 =24 Now, V_0= I_C R_L 0.6= I_C 500 I_C= 0.6 500 =1.2 10^ -3 ~A Now, = I_C I_B Base current I_B= I_C = 1.2 10^ -3 24 =5 10^ -5 =50 10^ -6 I_B=50 A
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