Inductive reactance is influenced by which two primary factors?

• A. Voltage and current
• B. Frequency and inductance
• C. Capacitance and resistance
• D. Magnetic field and time

Answer: (B)

Inductive reactance is determined by two main factors: frequency and inductance.

Inductance refers to the property of an electrical component, typically a coil or inductor, that resists changes in current. It is measured in henries (H) and is affected by the physical characteristics of the inductor, such as the number of turns in the coil and the core material.

Frequency, measured in hertz (Hz), is the rate at which the alternating current changes direction. As the frequency of the voltage increases, the inductive reactance also increases. This is because higher frequencies result in more rapid changes in current passing through the inductor, which generates a greater opposing voltage.

Inductive reactance can be calculated using the formula: (X_L = 2\pi f L), where (X_L) is the inductive reactance, (f) is the frequency, and (L) is the inductance. This formula highlights how both frequency and inductance combine to influence the overall reactance in an AC circuit.

The other options involve factors that do not directly affect inductive reactance, making them less relevant in this context.