The CE Short Circuit Gain Obtained with the Hybrid PI Model MCQ’s

Electronic Devices & Circuits Electronics & Communication Engineering

This set of Electronic Devices & Circuits Multiple Choice Questions & Answers (MCQs) focuses on “The CE Short Circuit Gain Obtained with the Hybrid PI Model”.

1. What is the function of RE in the CE short circuit gain obtained with hybrid pi model?
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 CE short circuit gain obtained with hybrid pi model?
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 CE short circuit gain obtained with hybrid pi model?
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 provide stability in CE short circuit gain obtained with hybrid pi model?
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 in CE short circuit gain obtained with hybrid pi model?
a) VCE = VCC + IC (RC + RE)
b) VCE = VCC – IC (RC + RE)
c) VCE = VCC – IC (RB + RE)
d) VCE = VCC + IC (RB + RE)

7. Why is CE short circuit gain obtained with hybrid pi model 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 CE short circuit gain obtained with hybrid pi model 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 CE short circuit gain obtained with hybrid pi model circuits?
a) Requires few resistors
b) Provides a lot of stability
c) Provides negative feedback
d) Provides positive feedback

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