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Electrical Symbols

Electrical Symbols. Electrical Circuit Symbols. a re a short- form convenience used in circuit diagrams to represent each of the components of a circuit. Note: always use a ruler for drawing circuit diagrams. Diagrams are generally either square-shaped or rectangular. Connecting Wires.

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Electrical Symbols

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  1. Electrical Symbols

  2. Electrical Circuit Symbols • are a short- form convenience used in circuit diagrams to represent each of the components of a circuit. • Note: always use a ruler for drawing circuit diagrams. Diagrams are generally either square-shaped or rectangular.

  3. Connecting Wires

  4. Light Bulb

  5. Open switch • Closed switch

  6. Battery • The longer line represents the positive terminal and the shorter end the negative terminal. • The number of sets of long/short lines represents the number of cells in the battery. Example: the battery below has 5 cells.

  7. Two-cell battery • Single cell battery

  8. Alternating Current • This is the type of current that flows through your house. It alternates direction.

  9. Resistor or Load • Resistors are used to slow the current. • Too much current can damage electrical appliances. • The stripes on the resistor indicate the amount of resistance provided by this particular resistor.

  10. Loads

  11. Ground Connector • Prevents electrical shock from current leaking into uninsulated parts of an appliance etc.

  12. Fuse: • A fuse is a thin piece of metal that will melt if the current is too high, thereby protecting the circuit.

  13. Voltmeter • A voltmeter measures the difference in electric potential energy between two points in a circuit.

  14. Ammeter • An ammeter measures the current

  15. Motor

  16. Practice Problems • Page 461 of ON Science 9, questions 3 and 5

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