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Question

Define the resistivity of a conductor.


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Solution

The resistivity of a Conductor:

  1. The resistivity of a conductor is defined as the resistance offered by the material per unit length for a unit cross-section.
  2. It is denoted by the symbol ρ
  3. The formula is ρ=R.AL, R is the resistance of the material, A is the area of cross-section and L is the length
  4. The property of the material can be defined by resistivity and is dependent on pressure and temperature.
  5. ρ=EJ, E is the electric field and J is the current density.
  6. The resistivity of conductors is low when compared to the resistivity of the insulators.
  7. The unit of resistivity is Ohm-meter.

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