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单词 electromotive force
释义

electromotive force

英汉-汉英词典
电动势
词组 | 习惯用语
您要查找的是不是:
    Electromotive force series 电动势序;动次序
    electromotive forces 电动势
    eletromotive force 电池电动势; 电动势;
    electromotive torce 电动势
    pulsating electromotive force 脉动电动势
    induced elctromotive force 感应电动势
    contact eletromotive force 接触电动势
    back electromotive forcef 反电势
electromotive force [电磁] 电动势
induced electromotive force [电磁] 感生电动势
counter electromotive force 逆电动势; [电磁] 反电动势;
electromotive force transducer 电动势变换器
thermal electromotive force 温差电动势
counter electromotive force starter 反电动势起动器
counter electromotive force inverter 反电动势变流器
counter electromotive force type regulator 反电动势式调整器
原声例句
Crash Course 综合篇

And emf, you’ll recall, stands for electromotive force, which is what causes electrons to move and form a current.

电动势,你会记得,代表电动势,这是导致电子移动并形成电流的原因。

Crash Course Physics 速成课物理

And that flux seeks to oppose the current with an electromotive force, or emf, in the opposite direction.

并且该通量试图以相反方向的电动势或电动势对抗电流。

Crash Course Physics 速成课物理

And emf, you'll recall, stands for electromotive force, which is what causes electrons to move and form a current.

你会记得,电动势代表电动势,它是导致电子移动并形成电流的原因。

Crash Course Physics 速成课物理

If you remember, Faraday's Law of Induction says that a changing magnetic field will induce an electromotive force in a loop of wire.

如果你还记得的话,法拉第定律说变化的磁场会在线圈中感应出电动势

Crash Course Physics 速成课物理

First, in the early 1800s, Michael Faraday showed us how a changing magnetic field induces an electromotive force, or emf, resulting in an electric current.

首先,在 19 世纪初,迈克尔·法拉第向我们展示了变化的磁场如何产生电动势或电动势,从而产生电流。

Crash Course 综合篇

Scientists say that the battery is a source of electromotive force, because it gets charge to move – but it’s not really providing a force, but rather a difference in electrical potential.

科学家们说, 电池是电动势的来源, 因为它需要充电才能移动——但它并不是真正提供力, 而是提供电势差。

Crash Course Physics 速成课物理

Scientists say that the battery is a source of electromotive force, because it gets charge to move – but it's not really providing a force, but rather a difference in electrical potential.

科学家们说,电池是电动势的来源,因为它使电荷移动——但它实际上并不提供力,而是提供电位差。

中文百科

电动势

法拉第圆盘是同极发电机的原型。将铜圆盘旋转于固定不动的马蹄形磁铁,由于洛伦兹力的作用于铜圆盘的电子,会生成动生电动势。
格奥尔格·欧姆(1789年—1854年)
通常的反应途径会要求初始反应物越过一个能量障壁,进入中间态,最后出现于一个较低能量的状态。假若涉及到电荷分离,这能量差可能会造成电动势。更详细论述,请参阅条目过渡状态[10]。
使用KNO3玻璃管型盐桥的电化电池。

在电路学里,电动势英语:electromotive force,缩写为emf)表征一些电路组件供应电能的特性。这些电路组件称为「电动势源」。电化电池、太阳能电池、燃料电池、热电设备、发电机等等,都是电动势源。电动势源所供应的能量每单位电荷是其电动势。假设,电荷 Q\, 移动经过一个电动势源后,获得了能量 W\, ,则此组件的电动势定义为 \mathcal{E} =\frac{W}{Q} 。通常,这能量是分离正负电荷所做的功,由于这正负电荷被分离至组件的两端,会出现对应电场与电压差。

在电磁学里,电动势又分为两种:「感生电动势」与「动生电动势」。根据法拉第感应定律,处于含时磁场的闭电路,由于磁场随着时间而改变,会有感生电动势出现于闭电路。感生电动势等于电场沿着闭电路的路径积分。处于闭电路的带电粒子会感受到电场,因而产生电流。

英语百科

Electromotive force 电动势

A typical reaction path requires the initial reactants to cross an energy barrier, enter an intermediate state and finally emerge in a lower energy configuration. If charge separation is involved, this energy difference can result in an emf. See Bergmann et al.[26] and Transition state.
Galvanic cell using a salt bridge
The equivalent circuit of a solar cell; parasitic resistances are ignored in the discussion of the text.
Solar cell voltage as a function of solar cell current delivered to a load for two light-induced currents IL; currents as a ratio with reverse saturation current I0. Compare with Fig. 1.4 in Nelson.[41]

Electromotive force, also called emf (denoted \mathcal{E} and measured in volt), is the voltage developed by any source of electrical energy such as a battery or dynamo. It is generally defined as the electrical potential for a source in a circuit. A device that supplies electrical energy is called a seat of electromotive force or emf. Emfs convert chemical, mechanical, and other forms of energy into electrical energy. The product of such a device is also known as emf.

近义、反义、联想词
近义词
n.
electrical phenomenon

英英词典
electromotive force n.
  1. the rate at which energy is drawn from a source that produces a flow of electricity in a circuit; expressed in volts

  2. synonymous: voltage, emf
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更新时间:2025/6/21 3:53:14