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Electric Current: Basics

Electric Current: Basics. Current Electricity. Current electricity is like current in a river. A high or fast river current means the water is rushing past the shore quickly. A high current in electricity means that the electrons are moving past points in the circuit quickly .

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Electric Current: Basics

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  1. Electric Current: Basics

  2. Current Electricity • Current electricity is like current in a river. • A high or fast river current means the water is rushing past the shore quickly. • A high current in electricity means that the electrons are moving past points in the circuit quickly.

  3. Current Electricity • Electrons keep moving around the circuit with a constant source of energy (ex. Battery, power outlet, etc.) • Energy gives the electrons a ‘push’

  4. Current Electricity • Current: the rate of electron flow past a given point in a circuit

  5. Current Electricity • Symbol: I • Units: Amperes (A) • Measured with: Ammeter

  6. Potential Difference

  7. Potential Difference • Potential Difference/Voltage: the difference in electrical energy per unit charge measured at two different points • Symbol: V • Units: Volts • Measured with: Voltmeter

  8. What is an Electric Circuit? • An electric circuit is a continuous path through which an electric current is passed • Electric circuits convert electrical energy into other forms of energy we need – such as heat or light.

  9. Parts of an Electric Circuit • There are five basic parts found in a simple electric circuit.

  10. Parts of an Electric Circuit • Energy Source • Provides electrical energy in a circuit • E.g. battery, electrical outlet Battery (energy source)

  11. Parts of an Electric Circuit • Load • An electrical device that converts electrical energy into another form • E.g. light bulb, motor Light Bulb (load)

  12. Parts of an Electric Circuit • Switch • A control device that opens or closes a circuit Switch

  13. Parts of an Electric Circuit • Connectors • Conducting wires carry the electrical energy Connectors

  14. Parts of an Electric Circuit • Meters • Measure current (ammeter) andpotential difference (voltmeter) Ammeter Voltmeter

  15. Electrical Symbols Energy Source – One Battery

  16. Electrical Symbols Energy Source One Battery (One Dry Cell) Two Batteries (Two Dry Cells)

  17. Electrical Symbols - Load Light Bulb

  18. Electrical Symbols - Load Light Bulb Motor

  19. Electrical Symbols - Switch Open Switch Closed Switch

  20. Electrical Symbols - Connectors Conducting wire

  21. Electrical Symbols - Meters Voltmeter Ammeter

  22. Electrical Symbols - Resistors Resistor

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