What is inductance?

Inductance is fundamentally defined as the property of a conductor to oppose changes in current flowing through it. This behavior arises due to the electromagnetic field generated by the conductor when electrical current passes through it. If the current increases or decreases, the changing magnetic field induces an opposing electromotive force (emf), which acts in the opposite direction to the change in current. This phenomenon is critical in many electrical applications, including transformers and inductors, where controlling current flow is essential for the stability and efficiency of electrical systems.

The other options describe different electrical concepts but not inductance specifically. For instance, the ability to carry electrical current pertains more to conductivity. The property of a conductor to store energy relates to capacitance rather than inductance. Lastly, measuring electrical power in a circuit involves parameters like voltage and current rather than the oppositional nature of inductance regarding current changes.