欧姆 Ohm
（重定向自Megaohm）
欧姆是电阻值的计量单位（在中国大陆简称为「欧」）；在国际单位制中是由电流所推导出的一种单位，其记号是希腊字母Ω(念作Ohm)。
为了纪念德国物理学家格奥尔格·欧姆而命名；他发现了电压和电流之间的关系，1A的电流通过
的电阻会产生1V的压降，这个关系式也称为欧姆定律。
megaohm
/'megəum/
英汉-汉英词典
n. 兆欧,10欧
词组 | 习惯用语
您要查找的是不是：
- omega n. 欧米加(希腊字母的最后一个字),最后,结局
- mega adj. 巨大的 adv. 非常 pref. 表示“大；百万”
- megohm n. [电]百万欧姆
- Megan n. 梅根（女子名）
megaohm n. 兆欧姆（等于meg-ohm）
中文百科
英语百科
Ohm 欧姆
（重定向自Megaohm）
The ohm (symbol: Ω) is the SI derived unit of electrical resistance, named after German physicist Georg Simon Ohm. Although several empirically derived standard units for expressing electrical resistance were developed in connection with early telegraphy practice, the British Association for the Advancement of Science proposed a unit derived from existing units of mass, length and time and of a convenient size for practical work as early as 1861. The definition of the ohm was revised several times. Today the definition of the ohm is expressed from the quantum Hall effect.
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