What is the SI unit of electric charge?

What is the SI unit of electric charge?

• A. Coulomb
• B. Volt
• C. Watt
• D. Ampere

Answer: (A)

Charge is measured in Coulombs. The Coulomb is defined as the amount of charge that passes a point when a steady current of one ampere flows for one second, linking charge to current and time via Q = I t. About 6.24×10^18 elementary charges make up one Coulomb. The other units correspond to different quantities: volt is electric potential difference, watt is power, and ampere is current. So Coulomb is the correct unit for electric charge.

Charge is measured in Coulombs. The Coulomb is defined as the amount of charge that passes a point when a steady current of one ampere flows for one second, linking charge to current and time via Q = I t. About 6.24×10^18 elementary charges make up one Coulomb. The other units correspond to different quantities: volt is electric potential difference, watt is power, and ampere is current. So Coulomb is the correct unit for electric charge.