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The unit of electrical resistance is the ohm, symbolized by the Greek letter omega (Ω). Electrical resistance is a measure of the opposition that a circuit or material presents to the flow of electric current. One ohm is defined as the resistance between two points in a conductor when a constant potential difference of one volt applied across those points produces a current of one ampere.

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  1. Electrical resistance and conductance
  2. Physical quantities
  3. Quantity
  4. Mathematical concepts
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