Electronics Engineering (ELEX) Board Practice Exam 2025 – The All-in-One Guide to Exam Success!

The primary function of an inductor in an electrical circuit is to store energy in the form of a magnetic field. When current flows through the coil of wire that makes up an inductor, a magnetic field is generated around it. This magnetic field represents stored energy, which can then be released back into the circuit when needed.

This characteristic makes inductors essential components in various applications, such as in transformers, inductive sensors, and in circuits designed for energy storage and smoothing current fluctuations. The inductor's ability to resist changes in current flow, due to this stored energy, is also crucial in filtering and timing applications.

In contrast, creating a resistive load is more aligned with resistors, which convert electrical energy into heat, while an inductor primarily influences reactive power rather than resistive load. The conversion of alternating current to direct current typically involves diodes or rectifiers rather than inductors. Additionally, while inductors can be used in filters to block high-frequency AC signals, their main role remains energy storage through the magnetic field, distinguishing them from components specifically designed for frequency filtering like capacitors.