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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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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 • In you exercise book: • copy the heading • write the name of each component • draw its symbol • copy the information about the component.
Components and their Symbols Cell A cell produces or stores electricity. Free electrons are produced by a chemical reaction between differing materials.
Components and their Symbols Battery Several cells joined together in series.
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.
Components and their Symbols Switch A device used in a circuit to turn the flow of energy on or off.
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).
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).
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.
Components and their Symbols • Rheostat A resistor whose value can be altered by adjusting the length of wire that carries the current.
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.
Draw this circuit diagram. Components • a cell • two lamp • ammeter Click to next page for the correct answer
A Answer
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
V Answer
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
A V Answer
Draw a circuit that contains: • a battery • an ammeter • a lamp • a switch • all joined in series. Draw a voltmeter joined across the lamp.
A V battery ammeter + - - + lamp switch - + voltmeter
A V Revision - Symbols • Ammeter • Cell • Battery • Voltmeter • Lamp • Resistor • Switch • Rheostat