ETA Electronics Certification 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

Identify the principle behind inductors.

Inductors amplify electrical signals.

Inductors store energy in a magnetic field when an electric current flows through them.

Inductors operate on the principle of electromagnetic induction, which involves storing energy in a magnetic field when an electric current passes through them. When current flows through the coil of wire that makes up the inductor, a magnetic field is created around the coil. This magnetic field stores energy, and the ability of the inductor to generate this field is determined by its physical characteristics, such as the number of coils, the type of core material, and the amount of current flowing.

The stored magnetic energy can be released back into the circuit when the current changes, making inductors essential components in various applications such as filters, oscillators, and transformers. They play a critical role in smoothing out fluctuations in current and can help to regulate voltage levels.

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Inductors are used to measure electrical resistance in a circuit.

Inductors act as insulators to prevent current flow.

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