The SI unit of electric current is which of the following?

The SI unit of electric current is which of the following?

• A. Ampere
• B. Volt
• C. Ohm
• D. Joule

Answer: (A)

Current is the flow of electric charge. The SI unit that measures how fast that flow happens is the ampere, defined as one coulomb of charge passing a point every second. This clarifies why a volt measures potential difference, an ohm measures resistance, and a joule measures energy—the ampere is specifically about the rate of charge movement, not energy or force or potential. In circuits, Ohm’s law links them via I = V/R, showing how voltage and resistance determine the current, which is counted in amperes.

Current is the flow of electric charge. The SI unit that measures how fast that flow happens is the ampere, defined as one coulomb of charge passing a point every second. This clarifies why a volt measures potential difference, an ohm measures resistance, and a joule measures energy—the ampere is specifically about the rate of charge movement, not energy or force or potential. In circuits, Ohm’s law links them via I = V/R, showing how voltage and resistance determine the current, which is counted in amperes.