Variable inductor

Chapter 4.4 Variable inductor

Lessons In Electric Circuits Volume VI – Experiments Book
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Summary of Contents

Lessons In Electric Circuits Volume VI – Experiments Book

  • 4.4. VARIABLE INDUCTOR1534.4Variable inductorPARTS AND MATERIALS• Paper tube, from a toilet-paper roll• Bar of iron or steel, large enough to almost fill diameter of paper tube• 28 gauge ”magnet” wire• Low-voltage AC power supply• Incandescent lamp, rated for power supply voltageCROSS-REFERENCESLessons In Electric Circuits, Volume 1, chapter 14: ”Magnetism and Electromagnetism”Lessons In Electric Circuits, Volume 1, chapter 15: ”Inductors”Lessons In Electric Circuits, Volume 2, chapter 3: ”Reactance and Impedance – Inductive”LEARNING OBJECTIVES• Effects of magnetic permeability on inductance.• How inductive reactance can control current in an AC circuit.SCHEMATIC DIAGRAMVariable inductorLampILLUSTRATION