What is the amount of electrical flow called?

• A. Capacitance
• B. Reactive power
• C. Frequency
• D. Current

Answer: (D)

Current is the amount of electrical flow. It is the rate at which electric charge passes a point in a circuit per unit time, and its unit is the ampere (A). This idea is captured by I = dQ/dt, so current measures how much charge moves every second. In DC it’s a steady flow, while in AC it varies over time. Capacitance describes how much charge a component can store for a given voltage, not how much flows per second. Reactive power relates to the portion of power that shuttles back and forth due to phase differences in AC, not the rate of flow. Frequency tells you how often the waveform repeats each second, measured in hertz. So the quantity that names the amount of electrical flow is current.