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Fundamental constantsClass 12, Current Electricity

Dimensional formula of Faraday constant

[T A mol-1]

SymbolF SI unitcoulomb per mole (C/mol)

The charge on one mole of electrons, about 96 485 C/mol.

Derivation

How to get the dimensional formula of Faraday constant

  1. Start from the definition: Faraday constant = electric charge / amount of substance.
  2. electric charge = electric current × time, so electric charge is [A] × [T] = [T A].
  3. Put in the dimension of each part: [T A] / [mol].
  4. Add the powers of each base quantity: [T A mol-1].
Practice

Three questions on Faraday constant

1Which is the dimensional formula of Faraday constant?

2What is the SI unit of Faraday constant?

3Do Faraday constant and Boltzmann constant have the same dimensions?

Questions

Faraday constant: quick answers

What is the dimensional formula of Faraday constant?

The dimensional formula of Faraday constant is [T A mol⁻¹]. It comes from Faraday constant = electric charge / amount of substance.

What is the SI unit of Faraday constant?

The SI unit of Faraday constant is the coulomb per mole (C/mol).

Is Faraday constant dimensionless?

No. Faraday constant has the dimensions [T A mol⁻¹].

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