Which term is defined as the measure of electrical current or power?

• A. Acuity
• B. Apex
• C. Ampere
• D. Arterial Bleeding

Answer: (C)

This item tests understanding of the unit used to quantify electrical current. The ampere, often shortened to amp, is the SI unit for electric current, defined as the flow of one coulomb of charge per second through a conductor. Current is a key part of power, since electrical power is P = IV, meaning power depends on the amount of current (in amperes) and the voltage. So the term that names the measure of electrical current is ampere. The other terms relate to different fields—acuity refers to vision sharpness, apex to a tip or peak, and arterial bleeding to a medical condition—so they don’t describe electrical quantities.