Extech PRT200 Phase Rotation Tester

LED - Light Emitting Diode - a small light source

AC - Alternating Current

Sounds - Audible notes that can be heard using ears

rotation - A circular motion of an object around a central axis

clockwise - A physical movement from left to right in a rotation

LED - Light Emitting Diode. A bulb that is very efficient at producing light. Often small.

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