Multiple choice general knowledge science & technology

input and output impedance of a opamp are

  1. infinity and zero

  2. zero and infinity

  3. zero and zero

  4. infinity and infinity
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A Correct answer
Explanation

An ideal operational amplifier has infinite input impedance (draws no current from the source) and zero output impedance (can drive any load without voltage drop). This allows it to amplify without loading the input signal or being affected by the load resistance.

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