pa help po, ohmmeter scale measurement po
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An ohmmeter (also known as an ohm
meter) is an instrument that measures the electrical resistance of a material (resistance is a measure of the opposition to the flow of electric current). Micro-ohmmeters (micro ohmmeter or microhmmeter) and Milliohmmeters make low resistance measurements, while Megohmmeters (a trademarked device by Megger) measure large values of resistance.
- Every device has electrical resistance. It may be large or small, and it increases with temperature for conductors and decreases with temperature for semiconductors.
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