Which of the following does not obey Ohm’s Law?

Alloys

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Diodes

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Metals

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None of these

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Solution

The correct option is B Diodes
A diode is made up of semiconductors. Ohm's law says the current passing through a conductor is proportional to the potential difference across the conductor. In the case of a diode, the current through it does not linearly depend on the potential difference. Hence, diodes do not obey Ohm's law.

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