PHYSICS IMPORTANT THEORY

Joules Law oh heating effect

 when a current 'i ' passes through a conductor of resistance 'r' for time 't' then the heat developed in the conductor is equal to the product of the square of the current, the resistance and time


Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it, provided all physical conditions and temperatures remain constant.

What are the factors affecting the resistivity of method?
The factors like temperature, alloying, cold work, age hardening & mechanical stress affect the resistivity of electrical materials.

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