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Concepts Of Physics MCQ Edition [Volume 2]PhysicsElectric Current in Conductors

For a cylindrical conductor, the product of its resistivity and conductivity depends upon

Options

  1. Amaterial
  2. Bcross-sectional area
  3. Ctemperature
  4. Dno physical parameters, being identically equal to 1

Correct answer

D. no physical parameters, being identically equal to 1

Step-by-step solution

Resistivity is denoted by and conductivity is denoted by . By definition, conductivity is the reciprocal of resistivity, i.e., = 1 . The product of resistivity and conductivity is = 1 = 1 . Since the product is a dimensionless constant equal to 1 , it does not depend on any physical parameters such as material, cross-sectional area, or temperature.

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