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Question

The electrical resistivity of a given metallic wire depends upon:


A

Its length

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B

its thickness

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C

its shape

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D

nature of the material

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Solution

The correct option is D

nature of the material


Electrical resistivity:

  1. The resistivity of a metallic wire is determined by the nature of the wire's material rather than its geometry.
  2. The electrical resistivity of a given metallic wire is determined by the density of free electrons in the conductor, which is determined by the material's nature, i.e. the number of free electrons per unit volume.
  3. It is also affected by the conductor's temperature.

Therefore, option D is the correct choice.


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