Symbols ‘Standard’

Symbols that may be used in the ‘Standard’ Examination Description.

 

Resistor, general, Ohm, 

Resistor, variable, Ohm,

 

Inductor, general, Henry, Inductor, iron cored, Henry,  Resistor, pre-set, Ohm, 

 

Transformer,

Resistor, potentiometer, Ohm,Lamp, (Watt) 

 Capacitor, general, Farad.

Switch, SPST,

 100px-SPST-Switch.svg

Capacitor, variable, Farad

 Capactitor variable

Switch, DPST

 DPSTCell or Battery, Volt

earth

 Fuse, Amp

 images

 Semiconductor Diode

 Diode semiconductor

Antenna

 aerial

 

Light Emitting Diode (LED)

Light emitting Diode 

Earth

 earth

Variable Capacitance Diode (Varactor, Varicap)

 

Variable Capacitance Diode (Varactor, Varicap)

Chassis

Symbol Chassis  Zener Diode

Zener Diode

 Crystal, Hertz

 Crystal, Hertz

Loudspeaker

 loudsp

Microphone

mic

Field Effect Transistor, (FET)

Fet

Transistor (NPN)Transistor (PNP)

Transistor (PNP)Last update 10/07/2014

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