The resistance of a metal wire of lenght 1m is 26 ohm at temp 20C. If the diameter of the wire is 0.3 mm, what will be the resistivity of the metal at that temperature?
We shall work on this problem using the formula that relates resistance (R), resistivity (ρ), length (l) and cross-sectional area (A) of the conductor.
The relation is,
here,
