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All devices follow Ohm's Law. It a matter of perspective, and realizing that some devices do not present constant resistance to a circuit. You can determine the resistance of a non-linear device, such as a diode, at a specific operating point, and do circuit analysis based on that.

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Note: Both of these answers are correct, even though they seem to disagree with each other. If this was a homework assignment, then congratulations, you've got some thinking to do and perhaps this question was successful in its intent.

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14y ago

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