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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 can increase or decrease the voltage of an alternating current.
  3. a device used to measure electrical current.
  4. attached to the armature in a motor; changes the direction of the electric current
  5. a large wheel with blades that rotates and provides mechanical energy to a generator

5 True/False Questions

  1. electromagneta device that contains a rotating electromagnet that changes electrical energy to mechanical energy


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


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


  4. alternating currentcurrent in which electrons constantly change direction at a regular rate


  5. electric motortemporary magnet made by passing an electric current through a wire coiled around an iron bar


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