Study Guides/Physics/Unit of Conductance
Study Guide · Physics

Unit of Conductance in Physics

In Class 12 Physics (Current Electricity chapter), Conductance is the opposite concept of Resistance. A good conductor has high conductance.

Question (Click to Flip)

What is the SI unit of conductance?

Answer

The SI unit of conductance is the Siemens (S), also called the Mho. It is the reciprocal of resistance (G = 1/R).

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Key Facts

Conductance (G): Reciprocal of resistance (G = 1/R).

SI Unit: Siemens (S), also called Mho.

Symbol: S.

High conductance = Low resistance (good conductor).

What is Conductance?

Conductance (G) is the measure of how easily electric current flows through a conductor.

  • Formula: G = 1/R (where R = Resistance in ohms)
  • The greater the resistance, the lower the conductance; the lower the resistance, the higher the conductance.

SI Unit of Conductance

The SI unit of Conductance is the Siemens (S), named after the German engineer Ernst Werner von Siemens.

  • Symbol: S
  • Also called: Mho (which is Ohm spelled backwards — a common older term).
  • Formula: 1 Siemens = 1 Ampere / 1 Volt = 1 / Ohm

Example: If a wire has resistance R = 5 Ω, its conductance G = 1/5 = 0.2 S (Siemens).

Questions and Answers

What is the SI unit of conductance?+

The SI unit of conductance is the Siemens (S), also called the Mho. It is the reciprocal of resistance (G = 1/R).

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