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For ideal non-inverting operational amplifier

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For ideal non-inverting operational amplifier

(a) Input and output resistances are infinite

(b) Input resistance is infinite and output resistance is zero

(c) Input resistance is zero and output resistance is infinite

(d) Input and output resistances are zero

The question was asked during an online interview.

This interesting question is from The Non Inverting Configuration topic in portion Operational Amplifiers of Electronic Devices & Circuits

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Correct answer is (b) Input resistance is infinite and output resistance is zero

The best I can explain: It is an ideal characteristic of the non-inverting op amp.

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