Question
difference between:
Resistance and resistivity
Resistance and resistivity
| Resistance | Resistivity |
| 1. Resistance is the ratio of the voltage applied between the two ends of a conductor to the electric current flowing through the conductor. ( $\left(R=\frac{V}{I}\right)$ | 1. Resistivity of a substance is the resistance offered by a conducting wire of unit length and unit cross- sectional area. $\left(\rho=R \cdot \frac{A}{l}\right)$ |
| 2. It depends on the type of substance, physical conditions such as temperature and pressure and dimensions of the conductor (length and area of cross-section). | 2. It depends on the type of substance, temperature of the conductor and pressure exerted on the conductor. |
| 3. Its SI unit is $\Omega.$ | 3. Its SI unit is $\Omega$ m. |
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