# Simplified Calculations for the CB Configuration MCQ’s

This set of Electronic Devices & Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Simplified Calculations for the CB Configuration”.

1. How do we compute the input resistance of a simplified CB amplifier model using hybrid parameters?
a) hfe / 1 – hfe
b) hfe / 1 + hfe
c) hie / 1 – hfe
d) hie / 1 + hfe

2. How do we compute the voltage gain of a simplified CB amplifier model using hybrid parameters?
a) hfe × RL / hie
b) -hfe × RL / hie
c) hfe × RL / hoe
d) -hfe × RL / hoe

3. How do we compute the current gain of a simplified CB amplifier model using hybrid parameters?
a) -hfe / 1 + hfe
b) -hfe / 1 – hfe
c) hfe / 1 + hfe
d) hfe / 1 – hfe

4. What is the value of voltage VB of a CB amplifier configuration if VCC = 12V, R1 = 25kΩ and R2 = 6kΩ?
a) 2.84V
b) 13.03V
c) 2.45V
d) 2.32V

5. How do we compute the voltage gain of a simplified CB amplifier?
a) RB || re
b) RC || re
c) RB / re
d) RC / re

6. What is the value of β in a simplified CB configuration amplifier if IC = 124mA and IB = 1.26mA?
a) 98.41
b) 99.24
c) 100
d) 97.33

7. What is the bias of a simplified common base (CB) amplifier configuration?
a) Reverse biased
b) Forward biased
c) Forward and reverse biased
d) It is independent of the bias

8. How do we compute the output impedance of a simplified CB amplifier?
a) RC + RL
b) RB + RL
c) RC || RL
d) RB || RL

9. What is the approximate value of the current gain of a simplified CB amplifier configuration?
a) 1
b) β
c) ∞
d) 0

10. The simplified common base amplifier configuration is useful in audio and radio frequency applications.
a) True
b) False