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Question & Answer1
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Explore TopicChoose the Best Answer
A
The output of the op-amp is fed back to the non-inverting input to increase the gain.
B
The output of the op-amp is connected to the inverting input to stabilize the output voltage.
C
The output of the op-amp is isolated from both inputs to avoid oscillation.
D
The op-amp is used in an open-loop configuration to maximize output swing.
Understanding the Answer
Let's break down why this is correct
Answer
Negative feedback in an op‑amp means that a portion of the output is fed back to the inverting input, so the amplifier reduces its gain until the output matches the input. In practice, this is done by connecting a resistor from the output to the inverting input and another resistor from that input to ground, making the op‑amp act as a voltage follower or a set‑gain amplifier. For example, if the op‑amp’s output rises, the feedback resistor pulls the inverting input higher, which pulls the output back down, stabilizing the circuit. The correct scenario is one where the output voltage is routed back to the negative input, not the positive input, thereby keeping the amplifier’s output close to the desired value. This arrangement keeps the amplifier’s behavior predictable and limits distortion.
Detailed Explanation
Negative feedback means the output is sent back to the inverting input. Other options are incorrect because The idea of feeding the output to the non‑inverting input is called positive feedback; Keeping the output away from both inputs does not create feedback.
Key Concepts
Negative Feedback in Op-Amps
Operational Amplifier Stability
Gain Control in Circuits
Topic
Negative Feedback in Op-Amps
Difficulty
medium level question
Cognitive Level
understand
Practice Similar Questions
Test your understanding with related questions
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Question 1Which of the following is a common application of negative feedback in operational amplifiers (op-amps)?
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Question 2An engineer is designing a circuit using an operational amplifier and decides to implement negative feedback. Which of the following scenarios best illustrates the concept of negative feedback in op-amps?
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Question 3A sound engineer is designing a feedback system for a microphone amplifier to minimize noise and enhance audio clarity. They decide to implement negative feedback in their op-amp circuit. Which of the following outcomes is the most likely result of using negative feedback in this scenario?
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Question 4Which of the following statements about negative feedback in operational amplifiers (op-amps) are true? (Select all that apply)
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Question 5Which of the following is a common application of negative feedback in operational amplifiers (op-amps)?
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Question 7Which of the following statements about negative feedback in operational amplifiers (op-amps) are true? (Select all that apply)
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Question 8Which of the following is a common application of negative feedback in operational amplifiers (op-amps)?
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Question 9An engineer is designing a circuit using an operational amplifier and decides to implement negative feedback. Which of the following scenarios best illustrates the concept of negative feedback in op-amps?
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Question 10A sound engineer is designing a feedback system for a microphone amplifier to minimize noise and enhance audio clarity. They decide to implement negative feedback in their op-amp circuit. Which of the following outcomes is the most likely result of using negative feedback in this scenario?
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