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Electricity

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  • Show magnetic attraction and repulsion. Make and use a simple electromagnet.
  • Explain the difference between a direct current and an alternating current. Tell the common uses of each.
  • Make a simple drawing to show how a chemical cell and an electric bell work.
  • Explain why a fuse blows or a circuit breaker trips. Tell how to find a blown fuse or tripped circuit breaker in your home. Show how to change the fuse or reset the circuit breaker safely.
  • Explain what overloading an electric circuit means. Tell what you have done to make sure your home circuits aren't overloaded.
  • Fix a bad cord on an appliance or a plug.
  • Show on a floor plan of a room in your home. Show first aid if the person is unconscious from electrical shock.
  • Show on a floor plan of a room in your home the lights, switches, and outlets. Show which fuse or circuit breaker protects each.
  • Read an electric meter. Figure an electric bill from meter readings.
  • Explain 10 electrical terms such as volt, ampere, watt, ohm, resistance, potential difference, rectifier, rheostat, conductor, ground, circuit, or short circuit.
  • Do any TWO of the following:
    1. Connect a buzzer, bell or light with a battery. Have a key or switch in the line.
    2. Make and run a simple electric motor (not from a kit).
    3. Build a simple rheostat. Show that it works.
    4. Build a single-pole double-throw switch. Show that it works.
    5. Hook a model electric train layout to a house circuit. Tell how it works.
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