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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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circuit diagrams

Basic Electricity

Circuit Diagrams

(Click the left mouse button to advance to the next slide.)

slide2

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
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 symbols1
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 symbols2
Components and their Symbols

Battery

Several cells joined

together in series.

components and their symbols3
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 symbols4
Components and their Symbols

Switch

A device used in a circuit to turn the flow of energy on or off.

components and their symbols5

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).

components and their symbols6

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 symbols7
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 symbols8
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
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.

slide13

Draw this circuit diagram.

Components

  • a cell
  • two lamp
  • ammeter

Click to next page for the correct answer

slide14

A

Answer

slide15

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

slide16

V

Answer

slide17

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
slide18

A

V

Answer

slide19

Draw a circuit that contains:

    • a battery
    • an ammeter
    • a lamp
    • a switch
  • all joined in series.

Draw a voltmeter joined across the lamp.

slide20

A

V

battery

ammeter

+

-

-

+

lamp

switch

-

+

voltmeter

revision symbols

A

V

Revision - Symbols
  • Ammeter
  • Cell
  • Battery
  • Voltmeter
  • Lamp
  • Resistor
  • Switch
  • Rheostat