What unit measures inductive reactance and what is its symbol?

Inductive reactance is measured in ohms, which is the unit of electrical resistance and reactance. The symbol used to denote inductive reactance is Xl (where "l" represents inductance). Inductive reactance occurs in inductors and is a measure of how much the inductor opposes the change in current due to its magnetic field.

Understanding that inductive reactance relies on the frequency of the alternating current and the inductance value, it’s important to note the core relationship defined by the formula: Xl = 2πfL, where Xl is the inductive reactance, f is the frequency, and L is the inductance in henries.

The other units mentioned in the choices pertain to different electrical characteristics: henries is the unit of inductance, farads is the unit for capacitance, and watts is the unit for power. Each of these plays a distinct role in electrical circuits and does not measure inductive reactance. This reinforces the understanding that the appropriate unit for inductive reactance is indeed ohms, with the symbol Xl.