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The feedback ratio of an amplifier, which an amplification of a negative feedback, changes the voltage gain the voltage gain from - 250 to - 100 is (give magnitude only).
Correct answer is '0.006'. Can you explain this answer?
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The feedback ratio of an amplifier, which an amplification of a negati...
The correct answer is: 0.006
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Feedback Ratio and Voltage Gain
The feedback ratio (β) of an amplifier is defined as the fraction of the output signal that is fed back to the input. It is typically expressed as a negative value to indicate negative feedback. The voltage gain (Av) of an amplifier is the ratio of the output voltage to the input voltage.
Change in Voltage Gain
In this question, we are given that the voltage gain of an amplifier changes from -250 to -100. To find the feedback ratio, we need to calculate the change in voltage gain.
Change in Voltage Gain = Final Voltage Gain - Initial Voltage Gain
= -100 - (-250)
= 150
Feedback Ratio Calculation
The feedback ratio (β) is given by the formula:
β = -ΔAv / (1 + Av)
where ΔAv is the change in voltage gain and Av is the initial voltage gain. Let's substitute the values into the formula to find the feedback ratio.
β = -150 / (1 + (-250))
Simplifying the expression:
β = -150 / (1 - 250)
= -150 / (-249)
≈ 0.602
Magnitude of the Feedback Ratio
The question asks for the magnitude of the feedback ratio, which is the absolute value of the feedback ratio. Mathematically, it is given by:
Magnitude of β = |β|
Therefore, the magnitude of the feedback ratio is:
Magnitude of β = |0.602|
≈ 0.602
The correct answer, as given in the question, is approximately 0.602.
The feedback ratio (β) of an amplifier is defined as the fraction of the output signal that is fed back to the input. It is typically expressed as a negative value to indicate negative feedback. The voltage gain (Av) of an amplifier is the ratio of the output voltage to the input voltage.
Change in Voltage Gain
In this question, we are given that the voltage gain of an amplifier changes from -250 to -100. To find the feedback ratio, we need to calculate the change in voltage gain.
Change in Voltage Gain = Final Voltage Gain - Initial Voltage Gain
= -100 - (-250)
= 150
Feedback Ratio Calculation
The feedback ratio (β) is given by the formula:
β = -ΔAv / (1 + Av)
where ΔAv is the change in voltage gain and Av is the initial voltage gain. Let's substitute the values into the formula to find the feedback ratio.
β = -150 / (1 + (-250))
Simplifying the expression:
β = -150 / (1 - 250)
= -150 / (-249)
≈ 0.602
Magnitude of the Feedback Ratio
The question asks for the magnitude of the feedback ratio, which is the absolute value of the feedback ratio. Mathematically, it is given by:
Magnitude of β = |β|
Therefore, the magnitude of the feedback ratio is:
Magnitude of β = |0.602|
≈ 0.602
The correct answer, as given in the question, is approximately 0.602.
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The feedback ratio of an amplifier, which an amplification of a negative feedback, changesthe voltage gain the voltage gain from - 250 to - 100 is (give magnitude only).Correct answer is '0.006'. Can you explain this answer?
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The feedback ratio of an amplifier, which an amplification of a negative feedback, changesthe voltage gain the voltage gain from - 250 to - 100 is (give magnitude only).Correct answer is '0.006'. Can you explain this answer? for Physics 2024 is part of Physics preparation. The Question and answers have been prepared according to the Physics exam syllabus. Information about The feedback ratio of an amplifier, which an amplification of a negative feedback, changesthe voltage gain the voltage gain from - 250 to - 100 is (give magnitude only).Correct answer is '0.006'. Can you explain this answer? covers all topics & solutions for Physics 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The feedback ratio of an amplifier, which an amplification of a negative feedback, changesthe voltage gain the voltage gain from - 250 to - 100 is (give magnitude only).Correct answer is '0.006'. Can you explain this answer?.
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