Which quantity is measured in Coulombs?

Which quantity is measured in Coulombs?

• A. Electric energy
• B. Electric current
• C. Electric resistance
• D. Electric charge

Answer: (D)

The quantity measured in Coulombs is electric charge. A Coulomb is the amount of charge carried, stored, or transferred. A handy way to relate it is that one Coulomb corresponds to one ampere of current flowing for one second. That shows why current—the rate of charge flow—uses seconds and amperes, while charge itself is counted in Coulombs. Electric energy uses Joules, and electric resistance uses ohms, so they aren’t measured in Coulombs.

The quantity measured in Coulombs is electric charge. A Coulomb is the amount of charge carried, stored, or transferred. A handy way to relate it is that one Coulomb corresponds to one ampere of current flowing for one second. That shows why current—the rate of charge flow—uses seconds and amperes, while charge itself is counted in Coulombs. Electric energy uses Joules, and electric resistance uses ohms, so they aren’t measured in Coulombs.