直流正負(fù)極的英文符號(hào)

Direct current (DC) is a type of electrical current that flows in only one direction. In order to identify the positive and negative ends of a DC circuit, specific symbols are used in electrical diagrams.

The positive end of a DC circuit is represented by the symbol '+', while the negative end is represented by the symbol '-'. These symbols are often referred to as the positive and negative poles, respectively.

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The positive and negative symbols are typically placed next to the respective ends of the circuit, indicating the direction of current flow. For example, if the positive symbol is at the top of a diagram and the negative symbol is at the bottom, current flows from top to bottom.

It is important to correctly identify the positive and negative ends of a DC circuit in order to properly connect electrical components. If the components are connected incorrectly, it can result in damage to the components or even a dangerous electrical shock.

In some cases, the symbols for positive and negative may be replaced with other symbols, such as arrows or dots. However, the meaning remains the same: the positive symbol represents the end of the circuit with a higher electrical potential, while the negative symbol represents the end with a lower electrical potential.

In summary, the symbols for positive and negative are crucial for identifying the ends of a DC circuit and ensuring proper electrical connections. Remember, always double-check the polarity of your circuit before connecting any electrical components to avoid damage or injury.