Alternating current measured in a transmission line will be

Alternating current (AC) measured in a transmission line is typically quantified in terms of amperes (amps). Amperes measure the amount of electrical current flowing through the transmission line. The measurement of AC also considers the voltage and frequency of the current, where voltage is measured in volts and frequency in hertz (Hz). The power transmitted through an AC transmission line, which is of significant interest, is typically measured in watts (W) or kilowatts (kW) for smaller scales, and in megawatts (MW) or gigawatts (GW) for larger scales of electrical transmission. The effective power, or real power, transmitted is calculated as P = V x I x cos(φ), where P is power in watts, V is the RMS voltage in volts, I is the RMS current in amperes, and cos(φ) represents the power factor, which is a measure of how effectively the current is being converted into useful work output.