Factors on which the specific resistance of a wire depends

The specific resistance of a wire depends on the temperature and the material that is used in the wire.

Specific resistance

Specific resistance is defined as the resistance offered per unit length and unit cross-sectional area when a voltage of known value is applied. Following is the formula of specific resistance:

$$\begin{array}{l}\rho =\frac{RA}{L}\end{array}$$

Where,

• ⍴ = Specific resistance
• R = Resistance
• A = Cross-sectional area
• L = Length of the wire

SI unit of specific resistance is ohm meter (Ωm).