直流正負(fù)極的英文符號(hào)是什么

Direct current (DC) is a type of electrical current that flows in only one direction. In electronic circuits, direct current is often represented by positive and negative symbols. The positive symbol is typically represented by a plus sign (+), while the negative symbol is represented by a minus sign (-).

The positive and negative symbols are used to identify the polarity of the direct current source. For example, in a battery, the positive terminal is connected to the positive symbol, while the negative terminal is connected to the negative symbol.

These symbols are important in electronic circuits because they help to ensure that components are connected correctly. If a component is connected to the wrong polarity, it may not function properly or may even be damaged.

In addition to the plus and minus symbols, direct current can also be represented by an arrow that indicates the direction of the current flow. The arrow points in the direction of the positive terminal and away from the negative terminal.

Overall, understanding the symbols used to represent direct current polarity is important for anyone working with electronic circuits. By using these symbols correctly, electronic devices can be designed and built to function properly and efficiently.