MCQs on BJT Amplification Concepts and BJT Modeling
Authored by Shridhar Sahu
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University
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What region must a BJT operate in to function as a linear amplifier?
Cut-off
Saturation
Active
Breakdown
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of the AC load line in an amplifier circuit?
To find the power dissipation
To analyze DC behavior
To determine the Q-point
To evaluate signal swing limits
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is transconductance (gm) in a BJT defined as?
IC / VCE
Change in output voltage / input voltage
Change in output current / change in input voltage
IB / VBE
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The unit of transconductance gm is:
Ohm
Siemens
Ampere
Volt
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following expressions represents gm in terms of collector current IC and thermal voltage VT?
gm = VT / IC
gm = IC / VT
gm = IC * VT
gm = VT * IC^2
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The input resistance looking into the base of a BJT is given by:
1 / gm
β / gm
VT / IC
IC / β
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the relationship between rπ and re?
rπ = β * re
rπ = re / β
rπ = α * re
rπ = gm * re
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