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.

Click to next page for the correct answer

Components• a cell

• two lamp

• ammeter

Answer

A

Draw this circuit diagram.

• a cell

• a lamp

• voltmeter across the lamp

• rheostat (variable resistor)

Components

Click to next page to view the correct answer

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