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5 Written questions

5 Multiple choice questions

  1. A group of atoms whose magnetic fields are aligned
  2. a device that contains a rotating electromagnet that changes electrical energy to mechanical energy
  3. two ends of a magnet where the magnetic forces are strongest
  4. the lines of force surrounding a permanent magnet or a moving charged particle
  5. temporary magnet made by passing an electric current through a wire coiled around an iron bar

5 True/False questions

  1. magnetismthe force that causes magnets to pull on objects that are made of certain metals, such as iron


  2. alternating currentElectrical current that flows in only one direction through a wire


  3. galvanometera device used to measure electrical current.


  4. transformera machine that changes mechanical energy into electric power


  5. direct currentcurrent in which electrons constantly change direction at a regular rate


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