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Introduction to Current Electricity and Circuits

Introduction to Current Electricity and Circuits. Learning Goals. By the end of this class I should be able to… …identify basic components of a circuit diagram …explain proper safety procedures regarding the use of electricity. Introduction to Current Electricity. Current Electricity

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Introduction to Current Electricity and Circuits

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  1. Introduction to Current Electricity and Circuits

  2. Learning Goals By the end of this class I should be able to… • …identify basic components of a circuit diagram • …explain proper safety procedures regarding the use of electricity

  3. Introduction to Current Electricity Current Electricity • A steady flow of electric charges that move through a conductor in a controlled way.

  4. Current Electricity vs. Electrostatic Discharge

  5. Current Electricity vs. Electrostatic Discharge • Similarities • Both involve the movement of electrons • Differences • Electrostatic Discharge follows an unpredictable path and occurs very quickly • Current follows a controlled path to power a device and is a steady flow of electrons.

  6. What causes electrons to flow? • Electric Cells • A portable device that converts chemical energy to electrical energy • Consist of two electrodes and a conducting solution called an electrolyte

  7. What causes electrons to flow? • Fuel Cell • Uses a continuous supply of chemicals to operate. • Hydrogen fuel cell.

  8. What causes electrons to flow? • Solar Cell • Uses energy from the Sun to create electric energy

  9. Parts of a Circuit • Electrical Source • The source of the electrical energy in a circuit • Common Examples: • Battery • Outlet

  10. Introduction to Current Electricity 2. Conductors • The part of the circuit that creates the path for the electricity to flow.

  11. Introduction to Current Electricity • Control or Switch • A device in a circuit that controls the flow of electrons by opening or closing the circuit. Circuit symbol

  12. Introduction to Current Electricity • Load • The part of the circuit that converts electrical energy into other forms of energy.

  13. Grade 9 Circuit Symbols

  14. Introduction to Current Electricity Current Electricity • A steady flow of electric charges that move through a conductor in a controlled way.

  15. Electrical Safety • Always ensure that your hands are dry and that you are standing on a dry surface • Do not use faulty equipment • Corroded batteries • Frayed wires • Only operate a circuit after it has been approved by your teacher. • Incorrect connections could cause short circuits or explosions. • Always open the circuit before making any changes.

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