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Single Stage Transistor Amplifiers MCQ Questions & Answers | Electrical Engineering

Learn Single Stage Transistor Amplifiers MCQ questions & answers are available for a Electrical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Single Stage Transistor Amplifiers MCQ question is the important chapter for a Electrical Engineering and GATE students.

1
A CE amplifier is also called ___________ circuit
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Answer & Solution
Answer: Option A
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2
A transistor amplifier has high output impedance because ___________
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Answer & Solution
Answer: Option B
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3
An amplifier has a power gain of 100. Its db gain is ___________
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Answer & Solution
Answer: Option B
Solution:
The gain in decibels (dB) is a way to express the ratio of two power levels on a logarithmic scale.
The formula to convert power gain to dB gain is:
dB gain = 10 * log10 (Power Gain)
In this question, the power gain is 100.
So, dB gain = 10 * log10 (100)
Since 100 is 10 squared (10^2), log10 (100) is 2.
Therefore, dB gain = 10 * 2 = 20 dB.
So, a power gain of 100 corresponds to a dB gain of 20 dB.
4
In a single stage transistor amplifier, RC and RL represent collector resistance and load resistance respectively. The transistor sees a d.c. load of ___________
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Answer: Option D
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5
A single stage transistor amplifier with collector load RC and emitter resistance RE has a d.c. load of ___________
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Answer: Option D
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6
The d.c. load of a transistor amplifier is generally ___________ that of a a.c. load
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Answer: Option C
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7
If a transistor amplifier feeds a load of low resistance (e.g. speaker), then voltage gain will be ___________
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Answer: Option D
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8
If RC and RL represent the collector resistance and load resistance respectively in a single stage transistor amplifier, then a.c. load is
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Answer: Option B
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9
It is generally desired that a transistor should have ___________ input impedance
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Answer & Solution
Answer: Option C
Solution:
Input impedance is like the resistance the amplifier presents to the signal source.
We generally want a high input impedance for a transistor amplifier.
Think of it this way:
A high input impedance means the amplifier doesn't load down the signal source too much.
If the input impedance is low, it would draw a significant amount of current from the source, reducing the signal strength and potentially distorting it.
Therefore, a high input impedance allows the amplifier to receive the signal with minimal disturbance to the source.
10
For highest power gain, one would use ___________ configuration
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Answer: Option C
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