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Circuit Diagrams

Basic Electricity. Circuit Diagrams. (Click the left mouse button to advance to the next slide.). Circuit Diagrams. We do not normally draw the equipment but use symbols as a kind of shorthand. (Write the heading Circuit Diagrams in your exercise book.). Components and their Symbols.

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Circuit Diagrams

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  1. Basic Electricity Circuit Diagrams (Click the left mouse button to advance to the next slide.)

  2. Circuit Diagrams We do not normally draw the equipment but use symbols as a kind of shorthand. (Write the heading Circuit Diagrams in your exercise book.)

  3. Components and their Symbols • In you exercise book: • copy the heading • write the name of each component • draw its symbol • copy the information about the component.

  4. Components and their Symbols Cell A cell produces or stores electricity. Free electrons are produced by a chemical reaction between differing materials.

  5. Components and their Symbols Battery Several cells joined together in series.

  6. Components and their Symbols Lamp A lamp contains a very thin wire (the filament) usually made of tungsten. The current passing through the filament causes it to get hot and glow.

  7. Components and their Symbols Switch A device used in a circuit to turn the flow of energy on or off.

  8. A Components and their Symbols • Ammeter An instrument for measuring current or flow of electrons in a circuit. The unit used is the ampere (A).

  9. V Components and their Symbols Voltmeter An instrument for measuring the potential difference (or energy change) between two points in a circuit. The unit used is the volt (V).

  10. Components and their Symbols Resistor A resistor is any material which is neither a good conductor of electricity nor an insulator. Resistors are important for varying the current in circuits.

  11. Components and their Symbols • Rheostat A resistor whose value can be altered by adjusting the length of wire that carries the current.

  12. Rules for drawing circuit diagrams.(Copy these into you exercise book) • Correct symbols must be used • Ruled straight lines for wires • No gaps / breaks in lines • Diagrams should be large Click when you have finished.

  13. Draw this circuit diagram. Components • a cell • two lamp • ammeter Click to next page for the correct answer

  14. A Answer

  15. Draw this circuit diagram. Components • a cell • a lamp • voltmeter across the lamp • rheostat (variable resistor) Click to next page to view the correct answer

  16. V Answer

  17. Draw this circuit diagram. Components • three cells • two lamps • a switch • ammeter Click to next page to view the correct answer • voltmeter across one lamp

  18. A V Answer

  19. Draw a circuit that contains: • a battery • an ammeter • a lamp • a switch • all joined in series. Draw a voltmeter joined across the lamp.

  20. A V battery ammeter + - - + lamp switch - + voltmeter

  21. A V Revision - Symbols • Ammeter • Cell • Battery • Voltmeter • Lamp • Resistor • Switch • Rheostat

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