What is the SI unit for electrical current?

What is the SI unit for electrical current?

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

Answer: (A)

Current is the rate at which electric charge flows past a point. The SI unit for this flow rate is the ampere (symbol A). By definition, one ampere means one coulomb of charge passing a point every second. This makes ampere the natural unit for measuring how much charge moves each second. The other options refer to different quantities: coulomb is a unit of charge (the total amount of charge), and volt is a unit of potential difference (how much energy per unit charge is available). A common misspelling is amphere, but the correct spelling is ampere. For example, if 4 coulombs pass a point in 2 seconds, the current is 2 amperes.

Current is the rate at which electric charge flows past a point. The SI unit for this flow rate is the ampere (symbol A). By definition, one ampere means one coulomb of charge passing a point every second. This makes ampere the natural unit for measuring how much charge moves each second. The other options refer to different quantities: coulomb is a unit of charge (the total amount of charge), and volt is a unit of potential difference (how much energy per unit charge is available). A common misspelling is amphere, but the correct spelling is ampere. For example, if 4 coulombs pass a point in 2 seconds, the current is 2 amperes.