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5 Written questions

5 Multiple choice questions

  1. a current-carrying coil of wire with many loops that acts as a magnet
  2. A group of atoms whose magnetic fields are aligned
  3. a large wheel with blades that rotates and provides mechanical energy to a generator
  4. two ends of a magnet where the magnetic forces are strongest
  5. a device used to measure electrical current.

5 True/False questions

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


  2. electromagnettemporary magnet made by passing an electric current through a wire coiled around an iron bar


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


  4. transformerA device that can increase or decrease the voltage of an alternating current.


  5. electric motora device that contains a rotating electromagnet that changes electrical energy to mechanical energy