A device that stores energy in a magnetic field is called a

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Enhance your understanding of the fundamentals of electricity with the AMT General Exam. Study with multiple-choice questions crafted to improve your knowledge and confidence. Prepare effectively for your success!

Multiple Choice

A device that stores energy in a magnetic field is called a

Explanation:
Storing energy in a magnetic field is a hallmark of an inductor. When current flows through a coil, it creates a magnetic field around it, and energy is stored in that field (amounting to 1/2 L I^2, where L is inductance and I is current). This magnetic-energy storage is what inductors are designed to do, and it’s why they resist changes in current due to self-induction. A capacitor stores energy in an electric field between its plates, not a magnetic field. A resistor dissipates energy as heat and doesn’t hold energy for later use. A diode controls the direction of current flow and also doesn’t store energy in a field.

Storing energy in a magnetic field is a hallmark of an inductor. When current flows through a coil, it creates a magnetic field around it, and energy is stored in that field (amounting to 1/2 L I^2, where L is inductance and I is current). This magnetic-energy storage is what inductors are designed to do, and it’s why they resist changes in current due to self-induction. A capacitor stores energy in an electric field between its plates, not a magnetic field. A resistor dissipates energy as heat and doesn’t hold energy for later use. A diode controls the direction of current flow and also doesn’t store energy in a field.

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