electromotive force

简明释义

电动势

英英释义

例句

1.The battery generates a constant electromotive force 电动势 that powers the flashlight.

电池产生恒定的电动势 电动势，为手电筒供电。

2.When measuring voltage, you are essentially measuring the electromotive force 电动势 across two points.

测量电压时，您实际上是在测量两个点之间的电动势 电动势。

3.The electromotive force 电动势 in this generator is produced by rotating a coil in a magnetic field.

这个发电机中的电动势 电动势是通过在磁场中旋转线圈产生的。

4.In a circuit, the electromotive force 电动势 is responsible for driving the current.

在电路中，电动势 电动势负责推动电流。

5.The electromotive force 电动势 of a solar cell can vary depending on the intensity of sunlight.

太阳能电池的电动势 电动势可以根据阳光强度而变化。

作文

Understanding the concept of electromotive force is crucial for anyone interested in the field of electricity and electronics. Electromotive force, often abbreviated as EMF, refers to the voltage generated by a source, such as a battery or generator, when no current is flowing in the circuit. It is the driving force that pushes electrons through a conductor, enabling the flow of electric current. This concept is fundamental in the study of circuits and electrical systems, as it directly influences how devices operate and interact with one another.To elaborate further, the electromotive force can be understood as the potential difference created by an energy source. For instance, when a battery is connected to a circuit, it creates a potential difference between its terminals. This difference is what we refer to as electromotive force. It is measured in volts (V), and it indicates the amount of energy provided per coulomb of charge that moves through the circuit.One important aspect of electromotive force is that it is not solely determined by the physical characteristics of the battery or generator. Other factors, such as temperature and the chemical composition of the materials involved, can also affect the EMF. For example, the internal resistance of a battery can cause a drop in voltage when current flows, which means that the actual voltage available to the load may be less than the electromotive force of the battery itself.In practical applications, understanding electromotive force helps engineers design more efficient electrical systems. For instance, in renewable energy systems, such as solar panels and wind turbines, the EMF plays a vital role in determining how effectively these systems convert natural energy into usable electrical power. By optimizing the electromotive force, engineers can enhance the overall efficiency and performance of these systems, making them more viable alternatives to traditional energy sources.Moreover, the concept of electromotive force extends beyond just batteries and generators. It is also applicable in various other contexts, such as electromagnetic induction, where a changing magnetic field induces a voltage in a conductor. This principle is the basis for many technologies, including transformers and electric motors, which rely on the interaction between magnetic fields and electric currents.Additionally, the relationship between electromotive force and current can be described by Ohm's Law, which states that current (I) is equal to the voltage (V) divided by the resistance (R) in the circuit. Understanding this relationship is essential for analyzing and designing electrical circuits, as it allows engineers to predict how changes in EMF or resistance will affect the overall current flow.In conclusion, the concept of electromotive force is a fundamental principle in the study of electricity and electronics. It encompasses the generation of voltage by energy sources and plays a critical role in the functioning of electrical systems. By grasping the nuances of electromotive force, individuals can better understand the behavior of circuits and contribute to advancements in technology that rely on efficient energy conversion and management. As our world becomes increasingly dependent on electrical systems, a solid understanding of EMF will be invaluable for future innovations in the field of engineering and technology.

理解电动势的概念对任何对电力和电子学感兴趣的人来说都是至关重要的。电动势，通常缩写为EMF，是指在电路中没有电流流动时，源（如电池或发电机）产生的电压。它是推动电子通过导体的驱动力，使电流得以流动。这个概念在电路和电气系统的研究中是基础性的，因为它直接影响设备的操作和相互作用。进一步阐述，电动势可以理解为由能量源产生的电位差。例如，当电池连接到电路时，它在其端子之间产生电位差。这种差异就是我们所称的电动势。它以伏特（V）为单位进行测量，并表示每库仑电荷通过电路时提供的能量。电动势的一个重要方面是，它不仅仅由电池或发电机的物理特性决定。其他因素，如温度和材料的化学成分，也会影响EMF。例如，电池的内阻在电流流动时可能导致电压下降，这意味着可供负载使用的实际电压可能低于电池本身的电动势。在实际应用中，理解电动势有助于工程师设计更高效的电气系统。例如，在可再生能源系统中，如太阳能电池板和风力涡轮机，EMF在确定这些系统将自然能量转换为可用电力的有效性方面起着至关重要的作用。通过优化电动势，工程师可以提高这些系统的整体效率和性能，使其成为传统能源来源更具可行性的替代品。此外，电动势的概念不仅限于电池和发电机。它还适用于各种其他上下文，例如电磁感应，其中变化的磁场在导体中感应出电压。这个原理是许多技术的基础，包括变压器和电动机，这些技术依赖于磁场与电流之间的相互作用。此外，电动势与电流之间的关系可以通过欧姆定律来描述，欧姆定律指出电流（I）等于电压（V）除以电路中的电阻（R）。理解这种关系对于分析和设计电气电路至关重要，因为它使工程师能够预测EMF或电阻的变化将如何影响整体电流流动。总之，电动势的概念是电力和电子学研究中的基础原则。它涵盖了能量源产生电压的过程，并在电气系统的功能中发挥着关键作用。通过掌握电动势的细微差别，个人可以更好地理解电路的行为，并为依赖于高效能量转换和管理的技术进步做出贡献。随着我们的世界越来越依赖电气系统，对EMF的深入理解将对未来工程和技术领域的创新具有重要价值。