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State Ohm's law ? How can it be verified...

State Ohm's law ? How can it be verified experimentally ? Does it hold good under all conditions ? Comment.

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Ohm's law does not hold good under all conditions as it is not a fundamental law of nature like Newton's laws. It is obeyed by metallic conductors only when physical conditions like temperature etc. are kept unchanged. It is not obeyed by a lamp filament, Junction diode, thermistor etc.
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