Question:
The input impedance of an ideal operational amplifier is
The input impedance of an ideal operational amplifier is
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Ideal op-amp has infinite input impedance, zero output impedance, and infinite open-loop gain.
Updated On: May 27, 2026
- Zero
- Very low
- Infinite
- Equal to output impedance
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The Correct Option is C
Solution and Explanation
Concept:
An ideal operational amplifier has idealized characteristics used for circuit analysis.
Step 1: An ideal op-amp should not draw current from the input source.
Step 2: For input current to be zero, input impedance must be infinite. \[ I_{in}=0 \]
Step 3: Therefore, input impedance of an ideal op-amp is: \[ \boxed{\text{Infinite}} \]
Step 1: An ideal op-amp should not draw current from the input source.
Step 2: For input current to be zero, input impedance must be infinite. \[ I_{in}=0 \]
Step 3: Therefore, input impedance of an ideal op-amp is: \[ \boxed{\text{Infinite}} \]
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