induction electromotive force

简明释义

感应电动势

英英释义

例句

1.To understand electromagnetic induction, one must grasp the concept of induction electromotive force (电动势感应).

要理解电磁感应，必须掌握induction electromotive force（电动势感应）的概念。

2.The principle of a transformer relies on the generation of induction electromotive force (电动势感应) to transfer energy between coils.

变压器的原理依赖于生成induction electromotive force（电动势感应）以在线圈之间传递能量。

3.In an electric generator, induction electromotive force (电动势感应) is produced as the coil rotates in a magnetic field.

在发电机中，随着线圈在磁场中旋转，会产生induction electromotive force（电动势感应）。

4.The induction electromotive force (电动势感应) can be calculated using Faraday's law of induction.

可以根据法拉第的电磁感应定律计算induction electromotive force（电动势感应）。

5.The efficiency of motors can be affected by the induction electromotive force (电动势感应) generated during operation.

电动机的效率可能会受到运行过程中产生的induction electromotive force（电动势感应）的影响。

作文

The concept of induction electromotive force is fundamental in the field of electromagnetism and plays a crucial role in various applications, from electric generators to transformers. To understand this phenomenon, we must first delve into the principles of electromagnetic induction, which was discovered by Michael Faraday in the 19th century. Faraday's law states that a change in magnetic flux through a circuit induces an electromotive force (emf) in that circuit. This induced emf is what we refer to as induction electromotive force or simply induced emf.In practical terms, when a conductor, such as a wire, moves through a magnetic field or when the magnetic field around a stationary conductor changes, an electric current is generated. This is the essence of how electric generators operate. For instance, in a hydroelectric power plant, water flows over turbines, causing them to spin. This spinning motion rotates coils of wire within a magnetic field, thereby generating a current through induction electromotive force.Moreover, the magnitude of the induced emf is directly proportional to the rate of change of the magnetic flux. This means that the faster the magnetic field changes or the quicker the conductor moves through the field, the greater the induced emf will be. This relationship is crucial for designing efficient electrical systems, as engineers must carefully consider the speed and strength of magnetic fields to optimize power generation.Another significant application of induction electromotive force is found in transformers, which are essential for transmitting electrical energy over long distances. Transformers work on the principle of electromagnetic induction, where alternating current in the primary coil creates a changing magnetic field that induces a voltage in the secondary coil. The ratio of the number of turns in the coils determines whether the transformer steps up or steps down the voltage, making it a vital component in electrical grids.Furthermore, induction electromotive force is not limited to large-scale applications; it also occurs in everyday devices. For example, induction cooktops use this principle to generate heat directly in cookware, providing an efficient cooking method. When a pot with a ferromagnetic base is placed on the cooktop, the alternating magnetic field induces currents in the pot, producing heat through resistance.Understanding induction electromotive force also involves recognizing its implications in safety and efficiency. Induced currents can lead to unintended consequences, such as electromagnetic interference or energy losses in circuits. Therefore, engineers must implement strategies to mitigate these effects, ensuring that systems operate safely and efficiently.In conclusion, induction electromotive force is a critical concept in electromagnetism that underpins many modern technologies. From the generation of electricity in power plants to the operation of household appliances, the principles of electromagnetic induction are at work, driving innovation and efficiency in our daily lives. By grasping the fundamentals of induction electromotive force, we can appreciate the intricate relationships between electricity and magnetism, paving the way for future advancements in technology and engineering.

“感应电动势”这一概念在电磁学领域中是基础性的，并在从发电机到变压器的各种应用中发挥着至关重要的作用。要理解这一现象，我们首先必须深入探讨电磁感应的原理，这一原理是在19世纪由迈克尔·法拉第发现的。法拉第定律指出，电路中的磁通量变化会在该电路中感应出电动势（emf）。这种感应出的电动势就是我们所称的“感应电动势”或简单地称为感应emf。在实际操作中，当导体（如电线）在磁场中移动，或者静止导体周围的磁场发生变化时，就会产生电流。这正是发电机工作的本质。例如，在水电站中，水流过涡轮，导致其旋转。这种旋转运动使得线圈在磁场中旋转，从而通过“感应电动势”产生电流。此外，感应电动势的大小与磁通量变化的速率成正比。这意味着，磁场变化越快，或者导体在磁场中移动得越快，感应出的电动势就越大。这种关系对于设计高效的电力系统至关重要，因为工程师必须仔细考虑磁场的速度和强度，以优化发电。“感应电动势”的另一个重要应用是在变压器中，变压器在长距离传输电能中是必不可少的。变压器基于电磁感应的原理工作，其中初级线圈中的交流电流产生一个变化的磁场，从而在次级线圈中感应出电压。线圈中的圈数比例决定了变压器是升压还是降压，使其成为电网中的重要组成部分。此外，“感应电动势”并不仅限于大型应用；它也发生在日常设备中。例如，感应炉灶利用这一原理直接在炊具中产生热量，提供了一种高效的烹饪方法。当带有铁磁基底的锅放在炉灶上时，交变磁场在锅中感应出电流，通过电阻产生热量。理解“感应电动势”还涉及认识其在安全性和效率方面的影响。感应电流可能导致意想不到的后果，例如电磁干扰或电路中的能量损失。因此，工程师必须实施策略来减轻这些影响，确保系统安全高效地运行。总之，“感应电动势”是电磁学中的一个关键概念，它支撑着许多现代技术。从发电厂的电力生成到家用电器的运作，电磁感应的原理在发挥作用，推动着我们日常生活中的创新和效率。通过掌握“感应电动势”的基本原理，我们可以欣赏到电与磁之间复杂的关系，为未来技术和工程的进步铺平道路。