功率

• 拼音: gōng lǜ
• 汉字拆解: 功 = work (physics); 率 = 幺 + 十 + 幺 — rate, ratio

含义

Power (physics). The rate at which work is done or energy is transferred, measured in watts (W).

A fundamental physics and engineering term: P = W/t (power equals work divided by time). Central in electrical engineering (额定功率 = rated power), engine design (发动机功率 = engine power), and appliance specifications. LED lighting, motors, and electronic devices are all described in terms of 功率.

例句

1. 这台发动机的额定功率为两百千瓦，能够满足重型车辆的动力需求。
2. LED灯泡的功率远低于传统白炽灯，但亮度毫不逊色。
3. 在物理学中，功率等于在单位时间内所完成的功。

用法指南

语境: physics, engineering, technology, electronics

语气: neutral

正确说法

• 请问这台空调的额定功率是多少瓦？(What is the rated power of this air conditioner in watts?)
• 提高电动机的功率可以显著缩短零部件的加工时间。(Increasing the electric motor's power can significantly reduce parts processing time.)

错误说法

• 将'功率'用于非技术语境中表达'效率'或'能力' — use 效率 for efficiency and 能力 for capability; 功率 is a precise technical term for the rate of energy transfer

起源与历史

功 (work, physics) + 率 (rate; ratio)

文化背景

世代: All ages

社会背景: Science and engineering students