Factors on which the specific resistance of a wire depends

Answer:

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).

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