Electronics Terms, Symbols And Tools - Ryobi RY48ZTR75 Service Manual

ELECTRONIC TERMS, SYMBOLS, AND TOOLS
Voltage is potential Energy noted by the symbol "V". For the scope
of this document, we are only concerned With DC voltage. So be
sure when setting the DMM to Measure voltage it is set to DC.
Resistance is opposition to the flow of current. Resistance is noted
by the Greek "Omega" symbol, Which resembles a horse shoe or
upside down "u" Measuring resistance is often used to detect
continuity Or a break in a wire or switch.
A Diode is a device that allows current to flow in only
one direction and blocks current flow in the other direction.
A Diode is noted by the symbol
The diode has a white band to indicate the polarity
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White band
Digital
Multi
Meter
(DMM)