What is the unit used to measure electric current?

• A. Volts
• B. Amperes
• C. Ohms
• D. Watts

Answer: (B)

Current is the flow of electric charges, and the amount flowing per second is measured in amperes. The ampere, abbreviated A, is the standard unit for this quantity, and devices like ammeters are designed to read current in amperes. The other options refer to different electrical quantities: volts measure potential difference (the driving force pushing charges), ohms measure resistance (how much a material resists the flow), and watts measure power (the rate of doing work or using energy), which equals voltage times current. In practice you might see smaller units like milliamps or microamps for tiny currents, but the fundamental unit for current is the ampere.