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,
Capacitor, variable, Farad
Switch, DPST
Cell or Battery, Volt
Fuse, Amp
Semiconductor Diode
Antenna
Light Emitting Diode (LED)
Earth
Variable Capacitance Diode (Varactor, Varicap)
Chassis
Zener Diode
Crystal, Hertz
Loudspeaker
Microphone
Field Effect Transistor, (FET)
Transistor (PNP)
Last update 28/01/2022
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