Collector-Emitter Feedback Bias MCQ’s

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This set of Electronic Devices & Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Collector-Emitter Feedback Bias”.

1. What is the function of RE in the collector emitter feedback circuit?
a) To improve stability and decrease positive feedback
b) To improve stability and increase positive feedback
c) To improve stability and decrease negative feedback
d) To improve stability and increase negative feedback

2. In the circuit given below, assume VCC = 5V, VBE = 0.7V, RE = 10kΩ, RB = 20kΩ and β = 50. How much is the current IE?

a) 0.561mA
b) 0.335mA
c) 0.413mA
d) 0.513mA

3. Why do we need collector emitter feedback bias?
a) To provide a non – linear output
b) To maintain transistor in active region
c) To maintain transistor in saturation region
d) To maintain transistor in cut – off region

4. What happens if collector current increases in a collector emitter feedback circuit?
a) Emitter voltage increases therefore base voltage increases
b) Emitter voltage decreases therefore base voltage decreases
c) Emitter voltage increases therefore base voltage decreases
d) Emitter voltage decreases therefore base voltage increases

5. How does emitter resistor RE provides stability?
a) Consumes less power
b) Has an easier circuit design
c) Automatically biases the circuit
d) It does not provide stability

6. How do you calculate the value of VCE ?
a) VCE = VCC + VC (RC + RE)
b) VCE = VCC – VC (RC + RE)
c) VCE = VCC – VC (RB + RE)
d) VCE = VCC + VC (RB + RE)

7. Why is collector emitter feedback better for linear circuits?
a) Independent of β
b) Dependent on β
c) Highly predictable
d) Not stable

8. In the circuit given below, assume VCC = 12V, VBE = 0.7V, RB = 330kΩ, RC = 3.3kΩ, RE = 2.7kΩ and β = 50. What is the base current IB?

a) 16.432µA
b) 17.856µA
c) 20.542µA
d) 17.936µA

9. How does the negative feedback help a collector emitter feedback circuit?
a) Helps make it more predictable
b) Provides opposing change in base voltage
c) Helps make it more predictable, provides opposing change in base voltage
d) It doesn’t affect

10. What are the disadvantages of collector emitter feedback bias circuits?
a) Requires few resistors
b) Provides a lot of stability
c) Provides negative feedback
d) Provides positive feedback

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