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5 Written questions

5 Multiple choice questions

  1. attached to the armature in a motor; changes the direction of the electric current
  2. the force that causes magnets to pull on objects that are made of certain metals, such as iron
  3. A device that can increase or decrease the voltage of an alternating current.
  4. Electrical current that flows in only one direction through a wire
  5. current in which electrons constantly change direction at a regular rate

5 True/False questions

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

          

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

          

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

          

  4. electromagnet inductiontemporary magnet made by passing an electric current through a wire coiled around an iron bar

          

  5. solenoida machine that changes mechanical energy into electric power