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

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Q. Assertion : Ohm’s law is applicable for all conducting elements.
Reason$\quad$: Ohm’s law is a fundamental law.

AIIMSAIIMS 2007Current Electricity

Solution:

Both the assertion and reason are false. Ohms law is obeyed by metals for a certain range of temperature, not obeyed by superconductors, valves, diodes and semiconductors. It is not a universal law but it is purely empirical.