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Which of the following physical quantities has the same unit as that of potential difference?
1. Electric field
2. Electric current 
3. Electromotive force
4. Stress

1 Answer

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Correct Answer - Option 3 : Electromotive force

CONCEPT:

  • Electric fieldThe region around an electric charge in which it can influence other charges is known as the electric field.
    • The SI unit of the electric field is Volt/meter (V/m).
  • Electric current: The rate of flow of electric charge is called electric current.
    • The SI unit of electric current is Ampere (A).
  • Electromotive force is the electric potential generated by either an electrochemical cell or a changing magnetic field
    • Electromotive force is commonly denoted by the acronym emf, EMF, or E.
    • The SI unit for electromotive force is the volt.
  • Stress: Force per unit area is called stress.
    • The SI unit of stress is N/m2​.

EXPLANATION:

  • Potential difference: The difference in electric potential between two points is called a potential difference. The SI unit is Volt (V).
  • The electromotive force has the same unit as that of potential difference.
  • So option 3 is correct.

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