What combines to create the self-resonance of a component?

All electronic components have unintended, or parasitic, characteristics in addition to their intended, or nominal, characteristic. For example, a physical inductor provides nominal inductive reactance, but the spacing between its wire windings also creates a small amount of parasitic capacitive reactance. When a component is exposed to alternating current, there is a specific frequency where its nominal reactance and its parasitic reactance are exactly equal and opposite. At this frequency, they cancel each other out, creating what is known as the component's self-resonance. Distractors like 'inductance and capacitance' or 'resistance and reactance' are incorrect because they fail to capture the specific relationship between a component's intended design (nominal) and its physical imperfections (parasitics) that cause this phenomenon.