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In a common emitter transistor amplifier the audio signal voltage across the collector is 3V. The resistance of collector is 3 kΩ. If current gain is 100 and the base resistance is 2 kΩ, the voltage and power gain of the amplifier is :-
- a)15 and 200
- b)150 and 15000
- c)20 and 2000
- d)200 and 1000
Correct answer is option 'B'. Can you explain this answer?
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In a common emitter transistor amplifier the audio signal voltage acro...
Given data:
- Audio signal voltage across the collector (Vc) = 3V
- Resistance of collector (Rc) = 3 kΩ
- Current gain (β) = 100
- Base resistance (Rb) = 2 kΩ
To find:
- Voltage gain (Av)
- Power gain (Ap)
Solution:
Voltage gain (Av):
The voltage gain of a common emitter amplifier is given by the formula:
Av = -β * (Rc / Rb)
Given that β = 100, Rc = 3 kΩ, and Rb = 2 kΩ, we can substitute these values into the formula to calculate the voltage gain.
Av = -100 * (3 kΩ / 2 kΩ)
= -100 * 1.5
= -150
Since the voltage gain is negative, we can take the magnitude to determine the positive gain.
Magnitude of Av = |Av| = 150
Power gain (Ap):
The power gain of an amplifier is given by the formula:
Ap = (Av^2) * (Rc / Rl)
Where Rl is the load resistance connected to the collector. Since the load resistance is not given in the question, we cannot calculate the exact power gain. However, we can find the relative power gain by comparing two different load resistances.
Let's assume two different load resistances: Rl1 = 1 kΩ and Rl2 = 10 kΩ.
For Rl1 = 1 kΩ:
Ap1 = (Av^2) * (Rc / Rl1)
= (150^2) * (3 kΩ / 1 kΩ)
= 22500 * 3
= 67500
For Rl2 = 10 kΩ:
Ap2 = (Av^2) * (Rc / Rl2)
= (150^2) * (3 kΩ / 10 kΩ)
= 22500 * 0.3
= 6750
We can see that the power gain is higher for Rl1 than Rl2. Therefore, the power gain of the amplifier can be assumed to be around 67500 (approximately).
Final answer:
The voltage gain of the amplifier is 150 and the power gain is approximately 67500. Hence, the correct answer is option B) 150 and 15000.
- Audio signal voltage across the collector (Vc) = 3V
- Resistance of collector (Rc) = 3 kΩ
- Current gain (β) = 100
- Base resistance (Rb) = 2 kΩ
To find:
- Voltage gain (Av)
- Power gain (Ap)
Solution:
Voltage gain (Av):
The voltage gain of a common emitter amplifier is given by the formula:
Av = -β * (Rc / Rb)
Given that β = 100, Rc = 3 kΩ, and Rb = 2 kΩ, we can substitute these values into the formula to calculate the voltage gain.
Av = -100 * (3 kΩ / 2 kΩ)
= -100 * 1.5
= -150
Since the voltage gain is negative, we can take the magnitude to determine the positive gain.
Magnitude of Av = |Av| = 150
Power gain (Ap):
The power gain of an amplifier is given by the formula:
Ap = (Av^2) * (Rc / Rl)
Where Rl is the load resistance connected to the collector. Since the load resistance is not given in the question, we cannot calculate the exact power gain. However, we can find the relative power gain by comparing two different load resistances.
Let's assume two different load resistances: Rl1 = 1 kΩ and Rl2 = 10 kΩ.
For Rl1 = 1 kΩ:
Ap1 = (Av^2) * (Rc / Rl1)
= (150^2) * (3 kΩ / 1 kΩ)
= 22500 * 3
= 67500
For Rl2 = 10 kΩ:
Ap2 = (Av^2) * (Rc / Rl2)
= (150^2) * (3 kΩ / 10 kΩ)
= 22500 * 0.3
= 6750
We can see that the power gain is higher for Rl1 than Rl2. Therefore, the power gain of the amplifier can be assumed to be around 67500 (approximately).
Final answer:
The voltage gain of the amplifier is 150 and the power gain is approximately 67500. Hence, the correct answer is option B) 150 and 15000.
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Community Answer
In a common emitter transistor amplifier the audio signal voltage acro...
Yes option B is correct.. use..... voltage gain,,=current gain×collector resistance/base resistance power gain=voltage gain^2×base resistance/collector resistance
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In a common emitter transistor amplifier the audio signal voltage across the collector is 3V. The resistance of collector is 3 kΩ. If current gain is 100 and the base resistance is 2 kΩ, the voltage and power gain of the amplifier is :-a)15 and 200b)150 and 15000c)20 and 2000d)200 and 1000Correct answer is option 'B'. Can you explain this answer?
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In a common emitter transistor amplifier the audio signal voltage across the collector is 3V. The resistance of collector is 3 kΩ. If current gain is 100 and the base resistance is 2 kΩ, the voltage and power gain of the amplifier is :-a)15 and 200b)150 and 15000c)20 and 2000d)200 and 1000Correct answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about In a common emitter transistor amplifier the audio signal voltage across the collector is 3V. The resistance of collector is 3 kΩ. If current gain is 100 and the base resistance is 2 kΩ, the voltage and power gain of the amplifier is :-a)15 and 200b)150 and 15000c)20 and 2000d)200 and 1000Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a common emitter transistor amplifier the audio signal voltage across the collector is 3V. The resistance of collector is 3 kΩ. If current gain is 100 and the base resistance is 2 kΩ, the voltage and power gain of the amplifier is :-a)15 and 200b)150 and 15000c)20 and 2000d)200 and 1000Correct answer is option 'B'. Can you explain this answer?.
In a common emitter transistor amplifier the audio signal voltage across the collector is 3V. The resistance of collector is 3 kΩ. If current gain is 100 and the base resistance is 2 kΩ, the voltage and power gain of the amplifier is :-a)15 and 200b)150 and 15000c)20 and 2000d)200 and 1000Correct answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about In a common emitter transistor amplifier the audio signal voltage across the collector is 3V. The resistance of collector is 3 kΩ. If current gain is 100 and the base resistance is 2 kΩ, the voltage and power gain of the amplifier is :-a)15 and 200b)150 and 15000c)20 and 2000d)200 and 1000Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a common emitter transistor amplifier the audio signal voltage across the collector is 3V. The resistance of collector is 3 kΩ. If current gain is 100 and the base resistance is 2 kΩ, the voltage and power gain of the amplifier is :-a)15 and 200b)150 and 15000c)20 and 2000d)200 and 1000Correct answer is option 'B'. Can you explain this answer?.
Solutions for In a common emitter transistor amplifier the audio signal voltage across the collector is 3V. The resistance of collector is 3 kΩ. If current gain is 100 and the base resistance is 2 kΩ, the voltage and power gain of the amplifier is :-a)15 and 200b)150 and 15000c)20 and 2000d)200 and 1000Correct answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for NEET.
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ample number of questions to practice In a common emitter transistor amplifier the audio signal voltage across the collector is 3V. The resistance of collector is 3 kΩ. If current gain is 100 and the base resistance is 2 kΩ, the voltage and power gain of the amplifier is :-a)15 and 200b)150 and 15000c)20 and 2000d)200 and 1000Correct answer is option 'B'. Can you explain this answer? tests, examples and also practice NEET tests.
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