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5 Written questions

5 Multiple choice questions

  1. current in which electrons constantly change direction at a regular rate
  2. temporary magnet made by passing an electric current through a wire coiled around an iron bar
  3. a device that contains a rotating electromagnet that changes electrical energy to mechanical energy
  4. a machine that changes mechanical energy into electric power
  5. Electrical current that flows in only one direction through a wire

5 True/False questions

  1. magnetic domainsA group of atoms whose magnetic fields are aligned

          

  2. magnetic fieldthe lines of force surrounding a permanent magnet or a moving charged particle

          

  3. turbinea current-carrying coil of wire with many loops that acts as a magnet

          

  4. magnetic polesA group of atoms whose magnetic fields are aligned

          

  5. galvanometera machine that changes mechanical energy into electric power