ESA Certified Alarm Technician Practice Exam

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Prepare for the ESA Certified Alarm Technician Exam with our comprehensive quiz. Test your knowledge using multiple choice questions, hints, and explanations. Get ready and confidently tackle the exam!

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Which of the following components can store electrical energy in an electric field?

  1. Inductor

  2. Capacitor

  3. Resistor

  4. Switch

The correct answer is: Capacitor

A capacitor is designed specifically to store electrical energy in an electric field. When voltage is applied across its plates, an electric field develops and energy is stored until the capacitor is discharged. This function distinguishes capacitors from other components. An inductor stores energy in a magnetic field, not an electric field, making it unsuitable for this question. Resistors are used to dissipate energy in the form of heat and do not store energy. A switch simply opens or closes a circuit and does not store any electrical energy. Thus, the unique capability of the capacitor to store energy in an electric field is what makes it the correct choice in this context.

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