What is Ohm\'s law? Derive an equation for Ohm\'s law?

1.	What is Ohm\'s law? Derive an equation for Ohm\'s law?
Answer» At a constant temperature ,the current passed through a wire id directly proportional to potential difference. When a I current is flowing through a semiconducter across its terminals of different potential difference V at constant heat.Then current I is directly proportional to V. V is proportinal to I Where sign of proportionality replaced by RSo, V = IR

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