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Question

On what factor does the resistance of a material depend? Define resistivity.


Solution

$$\rho ={{\rho }_{o}}(1-\alpha \Delta T)$$, 

$$ where, $$

$$ \rho =resitivity $$

$$ T=\,temperature $$

$$ \alpha =\text{constant} $$

Hence, resistivity depends on temperature.

Defination: Resistivity is measure of the resisting power of a specified material to the flow of an electric current.


Physics

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