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17/07/2021 4:14 pm
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Define resistivity. Write an expression for the resistivity of a substance. Give the meaning of each symbol which occurs in it.
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17/07/2021 4:17 pm
Resistivity, \(\rho = \frac{R \times A}{I}\)
When, R is the resistance of the conductor A is the area of cross-section of the conductor I is the length of the conductor.