In what unit is impedance measured?

Impedance is measured in ohms, which is the unit of measure for electrical resistance in a circuit. It represents the total opposition that a circuit presents to the flow of alternating current (AC), encompassing both resistance and reactance (which can be due to inductors and capacitors).

Understanding impedance is critical in electrical engineering because it determines how much current will flow in a circuit for a given voltage. In AC systems, unlike direct current (DC), both the resistance (real part) and reactance (imaginary part) need to be considered to fully analyze the behavior of electrical circuits.

Amperes are the unit of current, watts are the unit of power, and volts are the unit of electric potential. While these measurements are essential in analyzing circuits, they do not represent impedance itself, making ohms the only correct choice for measuring this particular quantity.