Ohm is denoted by symbol _________.

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NPCIL Stipendiary Trainee (Category-II) Official Paper (Held On: 11 Jun 2019)
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  1. Ω 
  2. π 
  3. ω 
  4. λ 

Answer (Detailed Solution Below)

Option 1 : Ω 
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Detailed Solution

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The correct answer is Ω .

Key Points

  • The ohm (symbol: Ω) is the SI derived unit of electrical resistance.
  • It is named after German physicist Georg Simon Ohm.
  • An ohm is defined as the electrical resistance between two points of a conductor when a constant potential difference of one volt, applied to these points, produces a current of one ampere.
  • The unit is represented by the Greek letter Omega (Ω).
  • The concept is essential in understanding and analyzing electrical circuits.

Additional Information

  • Georg Simon Ohm
    • He was a German physicist and mathematician.
    • Ohm is best known for Ohm's Law, which states that the current through a conductor between two points is directly proportional to the voltage across the two points.
  • Ohm's Law
    • The formula is V = IR, where V is voltage, I is current, and R is resistance.
    • It is a fundamental principle used in electrical engineering and physics.
  • SI Units
    • SI stands for the International System of Units.
    • It is the modern form of the metric system and the world's most widely used system of measurement.
  • Electrical Resistance
    • It is a measure of the difficulty to pass an electric current through a conductor.
    • Materials with low resistance are good conductors, while materials with high resistance are good insulators.
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