electromagnet

简明释义

英[ɪˈlektrəʊmæɡnət]美[ɪˈlektroʊmæɡnət]

n. 电磁体，[电] 电磁铁；电磁石

复 数 e l e c t r o m a g n e t s

英英释义

单词用法

同义词

反义词

例句

1.An electromagnet is a device whose magnetism is produced by an electric magnet.

电磁铁是一种由充电的磁铁发生磁力的安装。

2.The shredded material goes back on the belt, where an overhead electromagnet removes material containing iron as the waste moves along.

被粉碎的部分再次回到传送带上，那里有一个电磁铁，把带铁的东西拿走，剩下的继续前进。

3.Release mechanism controlled by electromagnet.

释放机构采用电磁铁控制。

4.Based on electromagnetic principle, electromagnet is used for actuator of active suspension and a electromagnetic actuator is structured.

基于电磁学原理，利用电磁铁作为主动悬架的作动器，构造出电磁作动器的一般结构。

5.An example for application is given for a brake electromagnet system.

文中给出了对制动电磁铁的应用实例。

6.Plunger Electromagnet is a kind of Electromagnet which is used the most extensive and yielded the greatest.

螺管式电磁铁是电磁铁中应用最广、产量最大的一种。

7.Other objects become magnetic only when in a magnetic field caused by a permanent magnet or an electromagnet.

其它物体只有在处于永久磁铁或电磁铁形成的磁场中时才具有磁性。

8.An electromagnet 电磁铁 is used in many household appliances, such as electric bells and door locks.

许多家用电器中使用了电磁铁，例如电铃和门锁。

9.The crane at the junkyard uses a powerful electromagnet 电磁铁 to lift heavy metal scraps.

废品场的起重机使用强大的电磁铁来提升重金属废料。

10.In MRI machines, an electromagnet 电磁铁 generates a strong magnetic field for imaging.

在MRI机器中，电磁铁产生强大的磁场用于成像。

11.The train system employs electromagnets 电磁铁 for levitation and propulsion.

火车系统利用电磁铁进行悬浮和推进。

12.An electromagnet 电磁铁 can be turned on and off, making it useful for various applications.

一个电磁铁可以开关，这使得它在各种应用中非常有用。

作文

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. Unlike permanent magnets, which maintain a constant magnetic field, electromagnets can be turned on and off, making them incredibly useful in various applications. The principle behind an electromagnet is based on Ampère's circuital law, which states that an electric current flowing through a conductor produces a magnetic field around it. When a wire is coiled into a loop and an electric current passes through it, the magnetic field is concentrated and amplified, creating a strong magnetic effect. One of the most common uses of electromagnets is in electric motors. In these devices, the electromagnet interacts with permanent magnets to produce motion. This interaction is crucial for converting electrical energy into mechanical energy, which powers everything from household appliances to industrial machinery. For instance, in a simple electric motor, the coil of wire acts as an electromagnet, and when electricity flows through it, the resulting magnetic field causes the rotor to spin. Another significant application of electromagnets can be found in magnetic levitation technology. Trains that use magnetic levitation (maglev) rely on electromagnets to lift and propel the train forward. By using powerful electromagnets, these trains can glide above the tracks, reducing friction and allowing for much higher speeds compared to traditional rail systems. This technology not only enhances travel speed but also contributes to a smoother ride. In the medical field, electromagnets play a vital role in Magnetic Resonance Imaging (MRI). MRI machines utilize strong electromagnets to generate detailed images of the organs and tissues within the body. The electromagnet creates a magnetic field that aligns the protons in the body. When radio waves are sent through this aligned field, the protons emit signals that are captured and transformed into images. This non-invasive imaging technique has revolutionized diagnostics in medicine, offering insights that were previously unattainable. Moreover, electromagnets are also used in various types of cranes and lifting equipment. They can lift heavy metal objects without the need for physical contact, making them ideal for recycling facilities or construction sites. The ability to control the strength of an electromagnet allows operators to pick up and release materials with precision, enhancing efficiency and safety in operations. Despite their many advantages, electromagnets also have some limitations. For example, they require a continuous supply of electricity to maintain their magnetic field. If the power is cut off, the electromagnet will lose its magnetism immediately. Additionally, the heat generated by the electric current can lead to overheating if not managed properly. Engineers must design electromagnets with adequate cooling systems to prevent damage during prolonged use. In conclusion, the electromagnet is a remarkable invention that has transformed numerous fields, from engineering to medicine. Its ability to create a controllable magnetic field has led to advancements that improve our daily lives and enhance technological capabilities. As research continues, we can expect even more innovative applications for electromagnets in the future, further demonstrating the importance of this fascinating technology.

电磁铁是一种磁铁，其磁场由电流产生。与保持恒定磁场的永久磁铁不同，电磁铁可以开关，这使它们在各种应用中非常有用。电磁铁的原理基于安培环路定律，该定律指出，通过导体流动的电流会在其周围产生磁场。当一根电线卷成环并且电流通过时，磁场被集中和放大，从而产生强大的磁效应。 电磁铁最常见的用途之一是在电动机中。在这些设备中，电磁铁与永久磁铁相互作用以产生运动。这种相互作用对于将电能转化为机械能至关重要，这为从家用电器到工业机械的所有设备提供动力。例如，在简单的电动机中，线圈作为电磁铁，当电流通过时，产生的磁场使转子旋转。 电磁铁的另一个重要应用可以在磁悬浮技术中找到。使用磁悬浮（maglev）的列车依赖电磁铁来抬升和推动列车向前。通过使用强大的电磁铁，这些列车可以在轨道上滑行，减少摩擦，并允许比传统铁路系统更高的速度。这项技术不仅提高了旅行速度，还为乘客提供了更平稳的乘坐体验。 在医疗领域，电磁铁在磁共振成像（MRI）中发挥着重要作用。MRI机器利用强大的电磁铁生成身体内部器官和组织的详细图像。电磁铁创建的磁场使身体中的质子排列。当无线电波通过这个对齐的场发送时，质子会发出信号，这些信号被捕获并转化为图像。这种非侵入性成像技术彻底改变了医学诊断，提供了以前无法获得的见解。 此外，电磁铁还用于各种类型的起重机和起重设备。它们可以在不接触的情况下提升重金属物体，非常适合回收设施或建筑工地。控制电磁铁强度的能力使操作员能够精确地拾取和释放材料，提高了操作的效率和安全性。 尽管电磁铁有许多优点，但它们也有一些局限性。例如，它们需要持续的电力供应来维持其磁场。如果电源切断，电磁铁将立即失去其磁性。此外，电流产生的热量如果不加以管理，可能会导致过热。工程师必须设计具有足够冷却系统的电磁铁，以防止在长时间使用期间损坏。 总之，电磁铁是一项非凡的发明，已经改变了多个领域，从工程到医学。它创造可控磁场的能力导致了改善我们日常生活的进步，并增强了技术能力。随着研究的不断深入，我们可以期待未来电磁铁会有更多创新应用，进一步展示这一迷人技术的重要性。