Inductance is a fundamental property of electrical circuits, quantifying the opposition to changes in current flow. It arises from the magnetic field generated by electric current; when the current passing through a conductor varies, it causes a corresponding change in magnetic flux, which, according to the laws of electromagnetism, induces a voltage electromotive force (EMF) within the circuit. This induced EMF always acts in a direction that opposes the change in the original current, a phenomenon critical for the function of components known as inductors. Inductance is measured in henries (H) and is essential for analyzing alternating current (AC) circuits and understanding electromagnetic energy storage within conductive coils.