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pH is a measure of the acidity or alkalinity of a substance on a scale of 0-14.
pH stands for 'potential of Hydrogen'
It measures the concentration of hydrogen ions in a solution
A pH of 7 is considered neutral, below 7 is acidic, and above 7 is alkaline
Examples: Lemon juice has a pH of around 2, while baking soda has a pH of around 9
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Use a non-contact voltage tester to test the wire without touching it.
Use a non-contact voltage tester that detects the electromagnetic field around the wire
Hold the tester near the wire and observe if it indicates the presence of voltage
Ensure the tester is properly calibrated and follow safety precautions
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