What is the unit for current?

What is the unit for current?

• A. Volts
• B. Amps
• C. Ohms
• D. Joules

Answer: (B)

Current is the rate at which electric charge flows through a conductor. The unit for that rate is the ampere, abbreviated A, defined as one coulomb of charge passing a point every second. So if 1 coulomb crosses per second, the current is 1 ampere. This ties into Ohm’s law, where current I equals voltage V divided by resistance R, with I measured in amps. The other options correspond to different quantities: volts measure electric potential difference, ohms measure resistance, and joules measure energy. The ampere’s name honors Andre-Marie Ampère, and an ammeter is used to measure this current.

Current is the rate at which electric charge flows through a conductor. The unit for that rate is the ampere, abbreviated A, defined as one coulomb of charge passing a point every second. So if 1 coulomb crosses per second, the current is 1 ampere. This ties into Ohm’s law, where current I equals voltage V divided by resistance R, with I measured in amps. The other options correspond to different quantities: volts measure electric potential difference, ohms measure resistance, and joules measure energy. The ampere’s name honors Andre-Marie Ampère, and an ammeter is used to measure this current.