Capacitor opposition to AC: Is the correct term for the opposition that a capacitor presents to alternating current known as capacitive reactance rather than reluctance?

Introduction / Context:
Terminology matters in circuit theory. The frequency-dependent opposition of capacitors and inductors in AC circuits is described by reactance, while 'reluctance' belongs to magnetic circuit analysis and has different units and meaning. Mixing these terms leads to conceptual errors.

Given Data / Assumptions:

• Sinusoidal steady state analysis context.
• Ideal capacitor behavior in linear circuits.
• Standard definitions of impedance and reactance.

Concept / Approach:
Capacitive reactance is Xc = 1 / (2 * pi * f * C), expressed in ohms, and decreases with frequency. Together with resistance R, it forms complex impedance Z = R − j * Xc in an RC series. 'Reluctance' describes magnetic opposition to flux: ℛ = l / (μ * A), with units of A/Wb, not ohms. Therefore, calling a capacitor's opposition 'reluctance' is incorrect; the correct term is capacitive reactance.

Step-by-Step Solution:

Verification / Alternative check:
Textbook impedance triangles and phasor diagrams use R and Xc to compute current and phase angle in RC networks, confirming terminology and equations.

Why Other Options Are Wrong:

Common Pitfalls:
Confusing resistance, reactance, and impedance; importing magnetic-circuit terms into electric-circuit contexts.

Final Answer:
Correct