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Analog ElectronicsOperational Amplifiers

For an ideal operational amplifier, the input impedance is assumed to be?

  • AZero
  • BInfinite
  • C1 ohm
  • DEqual to output impedance
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Correct Answer: B. Infinite
Explanation: An ideal op-amp draws zero input current; therefore its input impedance is considered infinite.
Reference: Ideal operational amplifier characteristics
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