An ampere is defined as the rate of electron flow equal to how many coulombs per second?

An ampere is defined as the rate of electron flow equal to how many coulombs per second?

• A. One coulomb per second
• B. One ampere per second
• C. One volt per second
• D. One ohm per second

Answer: (A)

Current is the rate at which electric charge flows past a point. The ampere is defined as one coulomb of charge passing per second, so 1 ampere equals 1 coulomb per second. If you picture electrons carrying charge, each electron has about 1.602 x 10^-19 coulombs, so roughly 6.24 x 10^18 electrons per second would correspond to 1 C/s. The direction of electron flow is opposite to conventional current, but the magnitude remains 1 C/s for an ampere. Other units like volt per second or ohm per second aren’t used to express current, and ampere per second would describe how quickly the current is changing, not the current’s instantaneous value.

Current is the rate at which electric charge flows past a point. The ampere is defined as one coulomb of charge passing per second, so 1 ampere equals 1 coulomb per second. If you picture electrons carrying charge, each electron has about 1.602 x 10^-19 coulombs, so roughly 6.24 x 10^18 electrons per second would correspond to 1 C/s. The direction of electron flow is opposite to conventional current, but the magnitude remains 1 C/s for an ampere. Other units like volt per second or ohm per second aren’t used to express current, and ampere per second would describe how quickly the current is changing, not the current’s instantaneous value.