Saved Bookmarks
| 1. |
What is difference between resistance and resistivity?explain in long format. |
| Answer» \tResistance across a conductor is the ratio of the potential difference across it to the current flowing through it. Resistivity of a material is the ratio of electric field strength to the current density at a specific temperature.\tResistance is measured in units of ohms (Ω). Resistivity is measured in units of ohm metres (Ω m).\xa0\tResistance depends on the object’s material, temperature as well as its dimensions (directly proportional to length, inversely proportional to the cross-sectional area for the case of a uniform metal wire). Resistivity is not dependent on the dimensions. It is, however, dependent on temperature. | |