Which unit is not a measure of electrical power?

The unit that is not a measure of electrical power is the volt. The volt is actually a unit of electric potential, which measures the potential difference required to drive one ampere of current through a resistance of one ohm. In contrast, watt, kilowatt, and megawatt are all units that measure electrical power, indicating the rate at which electrical energy is consumed or produced.

Power is defined as the rate of doing work or the rate of energy transfer, and in electrical terms, it can be calculated using the formula: Power (watts) = Voltage (volts) × Current (amperes). Therefore, while volts are an essential part of understanding electricity, they do not measure power directly. In contrast, watts quantify the actual usage of power (one watt equals one joule per second), and kilowatts and megawatts are simply larger multiples of watts, used for convenience in measuring larger amounts of electrical power.