electromotive force

简明释义

电动势

英英释义

例句

1.The electromotive force 电动势 in a circuit can be affected by temperature changes.

电路中的电动势 电动势可能会受到温度变化的影响。

2.The battery generates an electromotive force 电动势 that pushes the current through the circuit.

电池产生的电动势 电动势推动电流通过电路。

3.Engineers often measure the electromotive force 电动势 to determine the efficiency of a generator.

工程师通常测量电动势 电动势以确定发电机的效率。

4.The electromotive force 电动势 of a solar panel can vary depending on the amount of sunlight it receives.

太阳能电池板的电动势 电动势会根据接收到的阳光量而变化。

5.In a simple circuit, the electromotive force 电动势 is equal to the voltage provided by the power source.

在简单电路中，电动势 电动势等于电源提供的电压。

作文

In the realm of physics and electrical engineering, the term electromotive force refers to the energy provided per charge by an energy source, such as a battery or generator. It is often abbreviated as EMF and is measured in volts. Understanding electromotive force is crucial for anyone studying electricity and electronics, as it plays a fundamental role in circuits and the flow of electric current.To grasp the concept of electromotive force, we must first consider what it means to have a potential difference between two points in an electric circuit. When a voltage is applied across a conductor, it creates an electric field that causes charges to move. This movement of charges constitutes an electric current, which is the flow of electrons through a conductor. The electromotive force is responsible for initiating this flow of electrons, providing them with the necessary energy to overcome resistance in the circuit.One common example of electromotive force in action is found in batteries. A typical battery contains chemical substances that undergo a reaction to produce electrical energy. This reaction generates a voltage across the terminals of the battery, creating a electromotive force that pushes electrons through an external circuit when the battery is connected. The higher the electromotive force of a battery, the greater the potential for current flow, which can power devices ranging from small gadgets to large machinery.Another important aspect of electromotive force is its relationship with Ohm's Law, which states that the current flowing through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance of the conductor. This relationship can be expressed mathematically as V = IR, where V is the voltage (or electromotive force), I is the current, and R is the resistance. By understanding this relationship, engineers can design circuits that effectively utilize the electromotive force to achieve desired outcomes.Furthermore, the concept of electromotive force extends beyond just batteries. Generators also produce electromotive force through electromagnetic induction. When a conductor moves through a magnetic field, it induces a voltage across the conductor, generating a current. This principle is the basis for many power generation technologies, including hydroelectric plants and wind turbines. These systems harness natural energy sources to create a sustainable electromotive force, contributing to the growing demand for renewable energy solutions.In conclusion, the term electromotive force is a vital component of electrical theory and practice. It represents the energy supplied by an energy source to drive electric current through a circuit. By understanding electromotive force, students and professionals in the field of electrical engineering can better design and analyze circuits, ensuring that they function efficiently and effectively. As technology continues to advance, the importance of mastering concepts like electromotive force will only grow, enabling innovations that rely on electricity to power our modern world.

在物理和电气工程领域，术语电动势指的是能量源（例如电池或发电机）每单位电荷提供的能量。它通常缩写为EMF，单位是伏特。理解电动势对于任何学习电力和电子学的人来说都是至关重要的，因为它在电路和电流流动中发挥着基本作用。要理解电动势的概念，我们必须首先考虑在电路中两个点之间具有电位差意味着什么。当电压施加到导体上时，它会产生一个电场，使电荷移动。这种电荷的运动构成了电流，即电子通过导体的流动。电动势负责启动这种电子流动，为它们提供克服电路中电阻所需的能量。电动势在电池中的一个常见例子就是如此。典型的电池包含化学物质，这些物质发生反应以产生电能。这种反应在电池的端子之间产生电压，形成一种电动势，当电池连接时推动电子通过外部电路。电池的电动势越高，电流流动的潜力就越大，可以为从小型设备到大型机械的各种设备供电。电动势的另一个重要方面是它与欧姆定律的关系，欧姆定律指出，在两个点之间的导体中流动的电流与两个点之间的电压（或电动势）成正比，与导体的电阻成反比。这个关系可以用数学公式表示为V = IR，其中V是电压（或电动势），I是电流，R是电阻。通过理解这个关系，工程师可以设计有效利用电动势来实现预期结果的电路。此外，电动势的概念不仅限于电池。发电机也通过电磁感应产生电动势。当导体在磁场中移动时，会在导体上感应出电压，从而产生电流。这个原理是许多发电技术的基础，包括水电站和风力涡轮机。这些系统利用自然能源来产生可持续的电动势，满足对可再生能源解决方案日益增长的需求。总之，术语电动势是电气理论和实践的重要组成部分。它代表了能量源提供的驱动电流通过电路的能量。通过理解电动势，电气工程领域的学生和专业人士可以更好地设计和分析电路，确保其高效和有效地运行。随着技术的不断进步，掌握像电动势这样的概念的重要性只会增加，从而推动依赖电力为我们现代世界提供动力的创新。