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Ch. 22 - Magnetism

Ch. 22 - Magnetism. II. Uses of Magnetic Fields (p.628-632) Electromagnet Speaker Motor. A. Electromagnet. Electromagnet strong, temporary magnet formed when current is passed through a coil of wire surrounding an iron core acts like a bar magnet when current is on. B. Speaker. Speaker

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Ch. 22 - Magnetism

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  1. Ch. 22 - Magnetism II. Uses of Magnetic Fields (p.628-632) Electromagnet Speaker Motor

  2. A. Electromagnet • Electromagnet • strong, temporary magnet formed when current is passed through a coil of wire surrounding an iron core • acts like a bar magnet when current is on

  3. B. Speaker • Speaker • electrical energy  mechanical energy • wire coil moves back & forth as its magnetic field interacts with the field of a fixed magnet • forced vibration causes the cone to move  sound

  4. C. Motor • Motor • electrical energy  mechanical energy • electromagnet rotates between the poles of a fixed magnet • commutator reverses the poles of the e’magnet

  5. armature & commutator assembled motor brushes & wires to battery field magnet C. Motor

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