An increase in which of the following factors will increase a circuit's inductive reactance?

An increase in which of the following factors will increase a circuit's inductive reactance?

• A. Inductance and frequency
• B. Inductance and voltage
• C. Resistance and voltage
• D. Resistance and capacitive reactance

Answer: (B)

Inductive reactance depends on how strongly an inductor resists changes in current, and it scales with both inductance and frequency. The relationship is X_L = 2π f L, so increasing either L or f increases the inductive reactance. Voltage does not appear in this formula, so changing voltage won’t change X_L. Resistance only affects the real part of impedance, not the reactive part, and capacitive reactance behaves differently (X_C = 1/(2π f C)). Therefore, the factors that increase inductive reactance are inductance and frequency.

Inductive reactance depends on how strongly an inductor resists changes in current, and it scales with both inductance and frequency. The relationship is X_L = 2π f L, so increasing either L or f increases the inductive reactance. Voltage does not appear in this formula, so changing voltage won’t change X_L. Resistance only affects the real part of impedance, not the reactive part, and capacitive reactance behaves differently (X_C = 1/(2π f C)). Therefore, the factors that increase inductive reactance are inductance and frequency.