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Analog ElectronicsFeedback Amplifiers

In voltage-series negative feedback, the input resistance of an amplifier generally?

  • ADecreases
  • BIncreases
  • CBecomes zero
  • DIs unaffected in every circuit
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Correct Answer: B. Increases
Explanation: Series mixing at the input generally increases input resistance, while voltage sampling tends to reduce output resistance.
Reference: Standard analog electronics: feedback amplifiers
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