SOS Mechanic Certificate – Electrical Practice Exam

The property of a conductor that resists changes in current is known as inductance. Inductance occurs due to the magnetic field created by the flow of electric current in a conductor. When the current changes, the magnetic field also changes, which induces a voltage opposing this change. This phenomenon is a fundamental principle in electrical circuits, particularly in inductors and transformers, where it is used to manage and manipulate current and voltage.

Capacitance refers to the ability of a component to store electrical energy in an electric field, which is not related to resisting changes in current. Resistance, while it does impede current flow, does not specifically address the resistance to changes in that flow. Voltage represents the potential difference in an electric circuit but does not inherently describe any resistance to changes in current. Thus, inductance is the correct property that characterizes a conductor's ability to resist changes in current effectively.