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Circuit Diagrams
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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 Components and their SymbolsSymbols
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 Components and their SymbolsSymbols
Cell
A cell produces or stores electricity. Free electrons are produced by a chemical reaction between differing materials.
Battery
Components and their Components and their SymbolsSymbols
Several cells joined together in series.
Lamp
Components and their Components and their SymbolsSymbols
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.
Switch
Components and their Components and their SymbolsSymbols
A device used in a circuit to turn the flow of energy on or off.
• Ammeter
A
Components and their Components and their SymbolsSymbols
An instrument for measuring current or flow of electrons in a circuit. The unit used is the ampere (A).
Components and their Components and their SymbolsSymbols
An instrument for measuring the potential difference (or energy change) between two points in a circuit. The unit used is the volt (V).
Voltmeter
V
Resistor
Components and their Components and their SymbolsSymbols
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 Components and their SymbolsSymbols
A resistor whose value can be altered by adjusting the length of wire that carries the current.
• Rheostat
Rules for drawing Rules for drawing circuit diagrams.circuit diagrams.
((Copy these into you exercise Copy these into you exercise book)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.
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Components• a cell
• two lamp
• ammeter
Answer
A
Draw this circuit diagram.
• a cell
• a lamp
• voltmeter across the lamp
• rheostat (variable resistor)
Components
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Answer
V
Draw this circuit diagram.
• three cells
• two lamps
• a switch
• ammeter
Components
•voltmeter across one lamp
Click to next page to view the correct answer
Answer
A
V
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-
- -+ +
+
ammeter
battery
voltmeter
lamp
switch
Revision - Revision - SymbolsSymbols
• Battery
• Cell
• Lamp
• Ammeter• Voltmeter• Resistor
• Rheostat
• Switch
A
V
