State Ohm's law. Is it always true? - Vidyadip

Question

State Ohm's law. Is it always true?

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Answer

According to Ohm's law, the current flowing in a conductor is directly proportional to the potential difference across its ends provided the physical conditions and temperature of conductor remains constant.
No, it is not always true. E.g. Diode valve, junction diode etc. do not obey Ohm's law.

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