Which of the following would best describe a transformer?

Prepare for the NETA Level 1 Certification Exam with our quiz. Use flashcards and multiple-choice questions with explanations to enhance your understanding. Get exam-ready today!

A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction. It primarily functions to change voltage levels. When the voltage is raised, the current decreases, and vice versa, assuming that power is conserved excluding losses. Therefore, the best description of a transformer is that it changes both voltage and current levels together, as they are inversely related according to the principles of conservation of energy.

This relationship reflects the transformer's ability to step up or step down electrical systems based on the primary and secondary winding turns. While the other options focus on either current or voltage levels individually, the true nature of a transformer encompasses both aspects, making the choice that describes its capability to change both voltage and current levels the most accurate.

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