Inductive Reactance is defined as the opposition to current flow caused by an inductor in an AC circuit. Which option correctly identifies this concept?

• A. The opposition to current flow by an inductor in an AC circuit.
• B. The opposition to current flow by a capacitor in an AC circuit.
• C. The rate of change of voltage in an AC circuit.
• D. The total resistance in a DC circuit.

Answer: (A)

Inductive reactance is the opposition to current flow caused by an inductor when the circuit current is alternating. It happens because an inductor resists changes in current, and the changing current in the magnetic field induces a voltage that counteracts that change. In AC circuits this opposition is quantified by X_L = ωL (with ω = 2πf), so the resistance to current grows with frequency. That makes the option describing opposition to current flow by an inductor in an AC circuit the correct one. The other statements mix up concepts: a capacitor would create capacitive reactance, not inductive; the rate of change of voltage relates to the inductor’s V = L di/dt, not to inductive reactance itself; and DC circuits involve total resistance rather than reactive opposition, which is a frequency-dependent effect.