EE569 IPC Practice Test 2026 – Comprehensive Exam Prep

The correct answer is that both inductors and transformers are examples of coiled components. An inductor consists of a coil of wire, which creates a magnetic field when an electric current flows through it. This magnetic field is central to the inductor's ability to store energy in the form of magnetic energy. The coiled design enhances its ability to induce electromotive force (EMF) as per Faraday's law of electromagnetic induction.

Similarly, a transformer operates on the principles of inductance. It consists of two or more coils of wire (windings) that are magnetically coupled. When an alternating current passes through one coil, it generates a changing magnetic field that induces a voltage in the other coil, allowing electrical energy to be transferred between circuits at different voltage levels.

Capacitors, however, do not have a coiled design. They are composed of two conductive plates separated by a dielectric material and rely on an electric field to store energy. Therefore, although capacitors are essential components in electronic circuits, they do not fit the definition of coiled components.

Given that both inductors and transformers meet the criteria of being coiled components, the choice that includes both of them is indeed correct.