Word · Frequency #29200
ohm
欧姆
a unit of electrical resistance
- 1.
In the International System of Units, the derived unit of electrical resistance; the electrical resistance of a device across which a potential difference of one volt causes a current of one ampere.
国际单位制中电阻的导出单位,当导体两端电压为1伏特、电流为1安培时,其电阻为1欧姆。
欧姆（德国物理学家）；国际单位制中电阻的导出单位,当导体两端电压为1伏特、电流为1安培时,其电阻为1欧姆。；欧姆；[化] 欧姆
In use
This resistor has a resistance of ten ohms.
A typical speaker wire has very low resistance, often less than one ohm.
You can measure the resistance in ohms with a multimeter.
[number] ohms
数字后通常用复数 ohms；作定语时可写成带连字符的单数，如 a 10-ohm resistor。
This speaker is rated at 8 ohms.
这款音箱的额定阻抗为8欧姆。
be measured in ohms
in ohms 是表示单位的常用介词短语，ohms 用复数。
Electrical resistance is measured in ohms.
电阻以欧姆为单位计量。
a resistance of [number] ohms
该结构用于明确给出电阻值，of 后接具体数值和单位。
The cable has a resistance of 0.5 ohms.
这根电缆的电阻为0.5欧姆。
Common mistakes
A ohm is a unit of electrical resistance.An ohm is a unit of electrical resistance.
不定冠词要看发音而不是字母：ohm 以元音音素 /oʊ/ 开头，所以该用 an，不能用 a。
The resistance is 500 ohm.The resistance is 500 ohms.
ohm 是可数计量单位，数字大于 1 时要用复数 ohms；汉语没有复数形式，容易漏加 -s。
Connections
Collocations
- 10-ohm resistor
- 10欧姆电阻器
- A 10-ohm resistor limits the current in this LED circuit.10欧姆电阻器限制这个LED电路中的电流。
- rated at 8 ohms
- 额定阻抗为8欧姆
- These speakers are rated at 8 ohms.这些扬声器的额定阻抗为8欧姆。
- a resistance of 10 ohms
- 10欧姆的电阻
- The cable has a resistance of 10 ohms.这根电缆的电阻为10欧姆。
- measured in ohms
- 以欧姆为单位测量
- Electrical resistance is measured in ohms.电阻以欧姆为单位测量。
- ohm meter
- 欧姆表
- Use an ohm meter to check the resistance of the coil.用欧姆表检查线圈的电阻。
Confusing words
Learner notes
Memory Tip
谐音记忆：ohm 读作“欧姆”，欧姆定律定义了电阻单位，见到 ohm 就想到电阻。
Context & Register
语域：neutral 常见场景：physics lab、electronics workshop、circuit design 欧姆是电阻的标准单位，属于中性科技词汇，通常多用于物理、电子工程或电路相关的书面或技术说明中；日常口语里单独谈论这个单位的场合较少。
Pronunciation & Spelling
这些词都与 ohm /əʊm/ 押韵，尽管拼写不同：-ome (home, dome, tome)、-omb (comb)、-oam (loam, roam)。注意形近词可能发音不同：'om'（咒语）有时读 /ɒm/ 或 /oʊm/，而 'oh' 读 /əʊ/，没有结尾的 /m/。
Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.