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Alternating Current Applied to an Inductor

Consider an o...

Question

Consider an op-amp circuit shown in figure below,

The input resistance $R_{i n}$ of the circuit is ____ $k Ω$
5

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Solution

The correct option is A 5
Since, $V^{+} = V^{-}$ = Virtual ground = 0

Thus 3 k $Ω$ resistance will be of no use, thus the input resistance is 5 k $Ω$ .

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