Inductance is a property of an electrical conductor that opposes changes in current. When current flows through a conductor, it creates a magnetic field around it. If the current changes, the magnetic field also changes, which induces a voltage (electromotive force) that opposes the change in current. This property is known as self-inductance, measured in Henrys (H).

Inductors are fundamental components in electronic circuits, used in filters, transformers, energy storage, and power conversion applications. The inductance of a coil depends on its physical dimensions, the number of turns, and the magnetic properties of its core material.

Voltage Method: Uses the fundamental relationship V = L × (dI/dt), rearranged to find inductance. This method is useful when you can measure the voltage across an inductor and the rate of current change.

Flux Linkage Method: Based on the definition L = NΦ/I, where N is the number of turns, Φ is the magnetic flux through each turn, and I is the current. This method is useful for theoretical calculations.

Solenoid Formula: Calculates inductance from physical dimensions using L = μN²A/l. This is the most practical method for designing inductors, as it relates inductance directly to coil geometry and core material properties.