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Assertion (A): If the magnitude of loop gain of the amplifier is unity then the amplifier gives an a.c. output without any a.c. input signal.
Reason (R): The property of the regenerative feedback is utilised in oscillators.
  • a)
    Both A and R are true and R is the correct explanation of A.
  • b)
    Both A and R are true but R is not the correct explanation of A.'
  • c)
    A is true but R is false.
  • d)
    A is false but R is true.
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Assertion (A): If the magnitude of loop gain of the amplifier is unity...
The closed-iooD aain with positive feedback is
If the magnitude of loop gain i.e. |βA| - 1, then Af = ∞. Hence, the gain of the amplifier with positive feedback is infinite and the amplifier gives an a.c. output without any a.c. input signal. Thus, the amplifier acts as an oscillator. Regenerative or positive feedback is utilized in oscillators.
Hence, both assertion and reason are correct but reason is not the correct explanation of assertion.
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Assertion (A): If the magnitude of loop gain of the amplifier is unity then the amplifier gives an a.c. output without any a.c. input signal.Reason (R): The property of the regenerative feedback is utilised in oscillators.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.'c)A is true but R is false.d)A is false but R is true.Correct answer is option 'B'. Can you explain this answer?
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Assertion (A): If the magnitude of loop gain of the amplifier is unity then the amplifier gives an a.c. output without any a.c. input signal.Reason (R): The property of the regenerative feedback is utilised in oscillators.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.'c)A is true but R is false.d)A is false but R is true.Correct answer is option 'B'. Can you explain this answer? for Electronics and Communication Engineering (ECE) 2024 is part of Electronics and Communication Engineering (ECE) preparation. The Question and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus. Information about Assertion (A): If the magnitude of loop gain of the amplifier is unity then the amplifier gives an a.c. output without any a.c. input signal.Reason (R): The property of the regenerative feedback is utilised in oscillators.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.'c)A is true but R is false.d)A is false but R is true.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Electronics and Communication Engineering (ECE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion (A): If the magnitude of loop gain of the amplifier is unity then the amplifier gives an a.c. output without any a.c. input signal.Reason (R): The property of the regenerative feedback is utilised in oscillators.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.'c)A is true but R is false.d)A is false but R is true.Correct answer is option 'B'. Can you explain this answer?.
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