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  4. The electrical resistivity of a sample:

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Q. The electrical resistivity of a sample:

KEAMKEAM 2000

Solution:

The ratio of the intensity of the electric field $ (E) $ at any point within a conductor and the current density $ (J) $ at that point is called specific resistance or resistivity of the conductor $ \rho =\frac{E}{j} $ Specific resistance is the characteristic of the material of the conductor.