Advanced Qualification · A-002 Advanced components and circuits · A-002-008-002
What would be the characteristics of the ideal op-amp?
- AZero input impedance, infinite output impedance, infinite gain, and flat frequency response
- BInfinite input impedance, zero output impedance, infinite gain, and flat frequency response
- CZero input impedance, zero output impedance, infinite gain, and flat
- DInfinite input impedance, infinite output impedance, infinite gain and flat frequency response
Correct answer: B — Infinite input impedance, zero output impedance, infinite gain, and flat frequency response. From the official ISED question bank, verified word for word.
Why
An ideal operational amplifier acts as a perfect voltage sensor that draws no current from the source, meaning it needs infinite input impedance, while also acting as a perfect voltage source that can drive any load without losing strength, requiring zero output impedance. The full explanation — and one for every question — is in Pro.
Practise this section
Advanced components and circuits is section A-002 of the Advanced exam: Advanced components and circuits: semiconductors, amplifier classes, oscillators, mixers, filters and digital logic.
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