What does the inductive reactance (XL) of a coil depend on?

Inductive reactance (represented as XL) is a measure of the opposition that a coil or inductor presents to the change in current in an AC circuit. The formula to calculate inductive reactance is XL = 2πfL, where f is the frequency of the alternating current and L is the inductance of the coil.

This relationship highlights that inductive reactance is directly proportional to both the frequency of the AC signal and the inductance itself. As the frequency increases, the inductive reactance also increases, which means that the coil will have a greater opposition to the flow of AC current. Similarly, a coil with a greater inductance will also produce higher inductive reactance for the same frequency.

The other options do not accurately describe the factors affecting inductive reactance. Voltage and capacitance pertain more to capacitive reactance rather than inductive. Resistance and capacitance relate to different aspects of an AC circuit, primarily concerning power dissipation and energy storage. Power and voltage do not directly influence inductive reactance. Therefore, the dependency of inductive reactance on frequency and inductance is the reason why the first option is the correct answer.