electromotive force

简明释义

电动势

英英释义

例句

1.The battery generates an electromotive force 电动势 that drives the current through the circuit.

电池产生的电动势 电动势 驱动电流通过电路。

2.The electromotive force 电动势 produced by solar panels can power homes.

太阳能板产生的电动势 电动势 可以为家庭供电。

3.Ohm's law relates the current, voltage, and electromotive force 电动势 in a circuit.

欧姆定律将电路中的电流、电压和电动势 电动势 联系起来。

4.The electromotive force 电动势 of a cell can be measured using a voltmeter.

可以使用电压表测量电池的电动势 电动势。

5.In a generator, mechanical energy is converted into electromotive force 电动势.

在发电机中，机械能被转换为电动势 电动势。

作文

The concept of electromotive force is fundamental in the field of electrical engineering and physics. It refers to the energy provided per charge by an energy source, such as a battery or generator. This term is often abbreviated as EMF and is measured in volts. Understanding electromotive force is crucial for anyone studying circuits or working with electronic devices.To grasp the importance of electromotive force, one must first consider how electricity flows in a circuit. When a battery is connected to a circuit, it creates a potential difference between its terminals. This potential difference drives the flow of electrons through the circuit, which we perceive as electric current. The electromotive force is the driving force behind this movement, essentially pushing the electrons through the conductive material.There are several sources of electromotive force. One of the most common is chemical reactions in batteries. In a typical battery, chemical energy is converted into electrical energy, resulting in a voltage that represents the electromotive force. Another source can be electromagnetic induction, where a changing magnetic field within a coil of wire induces a voltage, again representing an electromotive force.Moreover, it is essential to distinguish electromotive force from potential difference. While both terms relate to voltage, they have different implications. The potential difference is the voltage across a component in a circuit, while electromotive force refers to the total energy supplied by the source before any energy is lost due to resistance in the circuit. This distinction is vital for analyzing circuits accurately and understanding how energy is transferred and transformed.In practical applications, knowing the electromotive force of a power source helps engineers design systems that can effectively utilize electrical energy. For instance, when designing a circuit, one must ensure that the electromotive force is sufficient to overcome the total resistance of the circuit to maintain the desired current flow. This relationship is described by Ohm's Law, which states that current is equal to voltage divided by resistance.In conclusion, electromotive force plays a pivotal role in the functioning of electrical circuits. It is the energy per unit charge that drives the flow of electrons, allowing for the operation of various electronic devices. By understanding the principles behind electromotive force, individuals can better appreciate the complexities of electrical systems and contribute to innovations in technology. As we continue to rely increasingly on electrical devices in our daily lives, the significance of mastering concepts like electromotive force cannot be overstated. It is not just a theoretical concept but a practical necessity in the world of electricity and electronics.

电动势的概念在电气工程和物理学领域中是基础性的。它指的是能量源（如电池或发电机）每单位电荷提供的能量。这个术语通常缩写为EMF，单位为伏特。理解电动势对于任何学习电路或从事电子设备工作的人来说都是至关重要的。要理解电动势的重要性，首先必须考虑电流在电路中的流动。当电池连接到电路时，它在其端子之间产生一个电位差。这个电位差驱动电子通过电路流动，我们将其视为电流。电动势是这种运动背后的推动力，基本上是推动电子通过导体材料。电动势有几种来源。其中最常见的是电池中的化学反应。在典型电池中，化学能转化为电能，导致一个电压，这代表了电动势。另一个来源可以是电磁感应，其中线圈内的变化磁场诱导出电压，再次代表电动势。此外，区分电动势和电位差是至关重要的。虽然这两个术语都与电压有关，但它们具有不同的含义。电位差是电路中某个元件的电压，而电动势则是源头所提供的总能量，在电路中损失的能量之前。这个区别对于准确分析电路和理解能量如何传递和转化至关重要。在实际应用中，了解电源的电动势帮助工程师设计能够有效利用电能的系统。例如，在设计电路时，必须确保电动势足以克服电路的总电阻，以维持所需的电流流动。这个关系由欧姆定律描述，即电流等于电压除以电阻。总之，电动势在电路的功能中发挥着关键作用。它是驱动电子流动的每单位电荷的能量，使各种电子设备得以运行。通过理解电动势背后的原理，个人可以更好地欣赏电气系统的复杂性，并为技术创新做出贡献。随着我们在日常生活中越来越依赖电气设备，掌握像电动势这样的概念的重要性不容小觑。这不仅仅是一个理论概念，而是电力和电子世界中的实际必要性。