UNIT IX. MAGNETISM

9.1 The Nature of Magnetism

- Learn the origin of magnetism in materials.

9.2 Magnetic Poles

- Describe the magnetic poles and the interactions  between magnets.

- Calculate the magnetic field magnitude.

9.3 The Generator

- Explain how an electric generator works and how it differs from

  a motor.

9.4 The Transformer

- Describe a transformer and solve problems involving voltage,

  current and turn ratios.