Traditional Culture Encyclopedia - Traditional virtues - How to distinguish the positive and negative poles of wires
How to distinguish the positive and negative poles of wires
1, which can be detected by multimeter.
2. It can be judged by the stress direction of the small magnetic needle around the electrified wire.
Note: Because the direction of current in AC circuit changes at any time, there is no difference between positive and negative power supply.
wire
Wire diànxiàn wire; Flex cable; A wire refers to a wire that conducts current.
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