What is the SI unit of the electric potential difference?

The correct answer is Volt.

Key Points

• Volt is the S.I. unit of electric potential difference.
• The coulomb is an SI unit of electric charge. 
• A joule is a derived unit of energy.
• Ampere is the SI unit of current.​

Important Points

• A voltmeter is always connected in parallel.
• An Ammeter is connected in series.
• A galvanometer is used for detecting and indicating electric current.
• 1 coulomb is equal to 6.24 × 10¹⁸ electrons.

 Additional Information

• The ampere (A), the SI base unit of electric current, is a familiar and indispensable quantity in everyday life.
• Coulomb, unit of electric charge in the meter-kilogram-second-ampere system, is the basis of the SI system of physical units.
  • It is abbreviated as C.
  • The coulomb is defined as the quantity of electricity transported in one second by a current of one ampere.
• The SI unit of electric resistance is the ohm (Ω).
  • 1 Ω = 1 V/A.
• The SI unit of force is the newton, symbol N.
  • The base units relevant to force are:
    • The meter, unit of length — symbol m.
• The SI unit of power is the watt (W), in honour of Scottish inventor James Watt (1736 - 1819).