Electrical Engineering (EE) Exam > Electrical Engineering (EE) Questions > An amplifier without feedback has a voltage g...
Start Learning for Free
An amplifier without feedback has a voltage gain of 50, input resistance of 1 kΩ and output resistance of 2.5 kΩ. The input resistance of the current shunt -ve feedback amplifier using the above amplifier with a feedback factor of 0.2 is
- a)1/11 kΩ
- b)1/5 kΩ
- c)5 kW
- d)11 kW
Correct answer is option 'A'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
An amplifier without feedback has a voltage gain of 50, input resistan...
Input Resistance with feedback for current shunt, 
.
.Most Upvoted Answer
An amplifier without feedback has a voltage gain of 50, input resistan...
Given parameters:
- Voltage gain (Av) = 50
- Input resistance (Rin) = 1 kΩ
- Output resistance (Rout) = 2.5 kΩ
- Feedback factor (β) = 0.2
We need to find the input resistance (Rin') of the current shunt -ve feedback amplifier.
Solution:
The input resistance of the current shunt -ve feedback amplifier is given as:
Rin' = Rin/(1 + β*Av)
Substituting the given values, we get:
Rin' = 1/(1 + 0.2*50) kΩ
Rin' = 1/11 kΩ
Therefore, the input resistance of the current shunt -ve feedback amplifier is 1/11 kΩ.
Explanation:
- Feedback is a technique used to improve the performance of an amplifier.
- In current shunt -ve feedback, a small part of the output voltage is fed back to the input in a way that it opposes the input signal.
- This reduces the input signal seen by the amplifier, which in turn reduces distortion and noise.
- The feedback factor (β) is the fraction of the output voltage that is fed back to the input.
- The voltage gain of an amplifier with feedback (Av') is given as:
Av' = Av/(1 + β*Av)
- The input resistance of an amplifier with feedback (Rin') is given as:
Rin' = Rin/(1 + β*Av)
- In the given problem, we have to find Rin' using the above formula.
- Substituting the given values, we get the answer as 1/11 kΩ.
- Voltage gain (Av) = 50
- Input resistance (Rin) = 1 kΩ
- Output resistance (Rout) = 2.5 kΩ
- Feedback factor (β) = 0.2
We need to find the input resistance (Rin') of the current shunt -ve feedback amplifier.
Solution:
The input resistance of the current shunt -ve feedback amplifier is given as:
Rin' = Rin/(1 + β*Av)
Substituting the given values, we get:
Rin' = 1/(1 + 0.2*50) kΩ
Rin' = 1/11 kΩ
Therefore, the input resistance of the current shunt -ve feedback amplifier is 1/11 kΩ.
Explanation:
- Feedback is a technique used to improve the performance of an amplifier.
- In current shunt -ve feedback, a small part of the output voltage is fed back to the input in a way that it opposes the input signal.
- This reduces the input signal seen by the amplifier, which in turn reduces distortion and noise.
- The feedback factor (β) is the fraction of the output voltage that is fed back to the input.
- The voltage gain of an amplifier with feedback (Av') is given as:
Av' = Av/(1 + β*Av)
- The input resistance of an amplifier with feedback (Rin') is given as:
Rin' = Rin/(1 + β*Av)
- In the given problem, we have to find Rin' using the above formula.
- Substituting the given values, we get the answer as 1/11 kΩ.
Attention Electrical Engineering (EE) Students!
To make sure you are not studying endlessly, EduRev has designed Electrical Engineering (EE) study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Electrical Engineering (EE).
|
Explore Courses for Electrical Engineering (EE) exam
|
|
Similar Electrical Engineering (EE) Doubts
Top Courses for Electrical Engineering (EE)View all
An amplifier without feedback has a voltage gain of 50, input resistance of 1 kΩ and output resistance of 2.5 kΩ. The input resistance of the current shunt -ve feedback amplifier using the above amplifier with a feedback factor of 0.2 isa)1/11 kΩb)1/5 kΩc)5 kWd)11 kWCorrect answer is option 'A'. Can you explain this answer?
Question Description
An amplifier without feedback has a voltage gain of 50, input resistance of 1 kΩ and output resistance of 2.5 kΩ. The input resistance of the current shunt -ve feedback amplifier using the above amplifier with a feedback factor of 0.2 isa)1/11 kΩb)1/5 kΩc)5 kWd)11 kWCorrect answer is option 'A'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about An amplifier without feedback has a voltage gain of 50, input resistance of 1 kΩ and output resistance of 2.5 kΩ. The input resistance of the current shunt -ve feedback amplifier using the above amplifier with a feedback factor of 0.2 isa)1/11 kΩb)1/5 kΩc)5 kWd)11 kWCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An amplifier without feedback has a voltage gain of 50, input resistance of 1 kΩ and output resistance of 2.5 kΩ. The input resistance of the current shunt -ve feedback amplifier using the above amplifier with a feedback factor of 0.2 isa)1/11 kΩb)1/5 kΩc)5 kWd)11 kWCorrect answer is option 'A'. Can you explain this answer?.
An amplifier without feedback has a voltage gain of 50, input resistance of 1 kΩ and output resistance of 2.5 kΩ. The input resistance of the current shunt -ve feedback amplifier using the above amplifier with a feedback factor of 0.2 isa)1/11 kΩb)1/5 kΩc)5 kWd)11 kWCorrect answer is option 'A'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about An amplifier without feedback has a voltage gain of 50, input resistance of 1 kΩ and output resistance of 2.5 kΩ. The input resistance of the current shunt -ve feedback amplifier using the above amplifier with a feedback factor of 0.2 isa)1/11 kΩb)1/5 kΩc)5 kWd)11 kWCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An amplifier without feedback has a voltage gain of 50, input resistance of 1 kΩ and output resistance of 2.5 kΩ. The input resistance of the current shunt -ve feedback amplifier using the above amplifier with a feedback factor of 0.2 isa)1/11 kΩb)1/5 kΩc)5 kWd)11 kWCorrect answer is option 'A'. Can you explain this answer?.
Solutions for An amplifier without feedback has a voltage gain of 50, input resistance of 1 kΩ and output resistance of 2.5 kΩ. The input resistance of the current shunt -ve feedback amplifier using the above amplifier with a feedback factor of 0.2 isa)1/11 kΩb)1/5 kΩc)5 kWd)11 kWCorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Electrical Engineering (EE).
Download more important topics, notes, lectures and mock test series for Electrical Engineering (EE) Exam by signing up for free.
Here you can find the meaning of An amplifier without feedback has a voltage gain of 50, input resistance of 1 kΩ and output resistance of 2.5 kΩ. The input resistance of the current shunt -ve feedback amplifier using the above amplifier with a feedback factor of 0.2 isa)1/11 kΩb)1/5 kΩc)5 kWd)11 kWCorrect answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
An amplifier without feedback has a voltage gain of 50, input resistance of 1 kΩ and output resistance of 2.5 kΩ. The input resistance of the current shunt -ve feedback amplifier using the above amplifier with a feedback factor of 0.2 isa)1/11 kΩb)1/5 kΩc)5 kWd)11 kWCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for An amplifier without feedback has a voltage gain of 50, input resistance of 1 kΩ and output resistance of 2.5 kΩ. The input resistance of the current shunt -ve feedback amplifier using the above amplifier with a feedback factor of 0.2 isa)1/11 kΩb)1/5 kΩc)5 kWd)11 kWCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of An amplifier without feedback has a voltage gain of 50, input resistance of 1 kΩ and output resistance of 2.5 kΩ. The input resistance of the current shunt -ve feedback amplifier using the above amplifier with a feedback factor of 0.2 isa)1/11 kΩb)1/5 kΩc)5 kWd)11 kWCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice An amplifier without feedback has a voltage gain of 50, input resistance of 1 kΩ and output resistance of 2.5 kΩ. The input resistance of the current shunt -ve feedback amplifier using the above amplifier with a feedback factor of 0.2 isa)1/11 kΩb)1/5 kΩc)5 kWd)11 kWCorrect answer is option 'A'. Can you explain this answer? tests, examples and also practice Electrical Engineering (EE) tests.
|
|
Explore Courses for Electrical Engineering (EE) exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup