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The unit of electromotive force (emf) is

The unit of electromotive force (emf) is Correct Answer volt

CONCEPT:

  • Electromotive force: Electromotive force or Emf is defined as the electric potential produced. It can be developed inside an electrochemical cell by Chemical Processes.
    • Emf is not a Force as by name it suggests.

EXPLANATION:

  1. Electromotive Force is Electric Potential generated. So, It will have the unit of Electric Potential or Potential Difference.
    • The unit of Electric Potential is Volt. Therefore, the Electromotive Force will have Volt as its Unit.
  2. Newton is the SI unit of Force, Electromotive force is not a force but equivalent to Electric Potential.
  3. Joule is the SI unit of Energy.
  4. Columb is the SI unit of Charge.

So, option 1 is Correct. 

Additional Information

  • Emf can also be introduced in a conductor by magnetic Induction. 
  • The term Electromotive force was coined by Alessandro Volta in the 1800s when he invented the first battery.

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