Derivation of Ohms law

Ohm's law

Given any two limitations of Ohm’s law.

Which of the following is mathematical equation of Ohm's law ?

Ohms law says

Assertion : Ohm's law is applicable for all conducting elements. Reason : Ohm's law is a fundamental law.

Assertion: Ohm's law is not valid if current depends on voltage non-linearly. Reason: Ohm's law is a fundamental law of nature.

Under what conditions is Ohm's law applicable ?

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