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Question

State the laws of resistance.


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Solution

Laws of resistance :

  1. If the temperature and other physical variables stay constant, the resistance of a conductor is exactly proportional to its length. It means that Rl, i.e., if the length rises, the resistance increases as well, and if the length reduces, the resistance lowers as well.
  2. When all other variables are constant, the resistance of a conductor is inversely proportional to the area of a cross-section i.e. R1A
  3. R is determined by the type of the conductor's substance. It implies that if we take equal lengths of wires made of copper, aluminum, and iron with the same cross-sectional area, their resistance will differ since they are made of various materials.

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