Which unit of measure represents "real" power?

The unit of measure that represents "real" power is Watts. Real power, often referred to as active power, is the actual power that performs useful work in a circuit. It is the energy consumed by electrical devices in a given time frame and is calculated in terms of voltage and current in a resistive circuit.

In an AC circuit, the concept of real power is especially important because it takes into account the phase difference between voltage and current. The formula for calculating real power is P = VIcos(ϕ), where P is the real power in Watts, V is the voltage, I is the current, and cos(ϕ) is the power factor, which accounts for the phase difference.

Watts distinctively represent energy consumption, and understanding this measurement is crucial for evaluating the efficiency and performance of electrical systems. Other units like Ohms measure resistance, Volt-Amps represent apparent power (which does not account for phase differences between voltage and current), and Hertz measures frequency, which are essential concepts but do not give the actual usable power in a circuit.