Electronics and Communication Engineering - Exam Questions Papers - Discussion
Discussion Forum : Exam Questions Papers - Exam Paper 3 (Q.No. 9)
9.
The figure shown below is designed to act as a constant current source across the load resistor. The β of transistor is 50. What is the value of load current?
Answer: Option
Explanation:
Voltage at base = 12 - 5 = 7 v
Voltage at emitter = 7 + 0.7 = 7.7 v
Current through R1 = 2 mA
Thus current through load = 
= 1.96 mA.
Discussion:
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