Electricity · Class 10 · CBSE Science

Which of the following units is equivalent to the SI unit of electrical resistance, the ohm?

Practice question from Electricity (Class 10 · CBSE Science), with the correct answer and a step-by-step solution.

easy · MCQ · Q-76F59F

Which of the following units is equivalent to the SI unit of electrical resistance, the ohm?

  1. A.Volt \times \text{ampere}
  2. B.Volt / \text{ampere}Correct answer
  3. C.Ampere / \text{volt}
  4. D.Joule \times \text{coulomb}

Solution

According to Ohm's law, V=IRV = IR, which can be rearranged as R=V/IR = V / I. The SI unit of potential difference (VV) is the volt, and current (II) is the ampere. Therefore, 1 ohm=1 volt/1 ampere1 \text{ ohm} = 1 \text{ volt} / 1 \text{ ampere}.

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