electric displacement

简明释义

电位移

英英释义

例句

1.In electromagnetism, electric displacement is defined as the electric field adjusted for the presence of dielectric materials.

在电磁学中，电位移被定义为考虑介电材料存在后的电场。

2.The electric displacement field is often used in dielectric materials to characterize their response to an applied electric field.

电位移场常用于介电材料，以表征其对施加电场的响应。

3.The relationship between electric displacement and polarization is fundamental in electrodynamics.

电位移与极化之间的关系在电动力学中是基本的。

4.When analyzing the behavior of insulators, electric displacement can help predict how they will react under high voltage.

在分析绝缘体的行为时，电位移可以帮助预测它们在高电压下的反应。

5.In a capacitor, the concept of electric displacement is crucial for understanding how the device stores energy.

在电容器中，电位移的概念对于理解设备如何储存能量至关重要。

作文

In the study of electromagnetism, the concept of electric displacement plays a crucial role in understanding how electric fields interact with materials. Electric displacement, or '电位移', is a vector field that represents the distribution of electric charges in a medium. It accounts for the effects of free and bound charges within dielectric materials, providing a more comprehensive picture of how electric fields propagate through different substances.To grasp the significance of electric displacement, we must first consider the basic principles of electric fields. When a voltage is applied across a conductor, it creates an electric field that influences the movement of charged particles. However, when this electric field interacts with dielectric materials, such as rubber or glass, the behavior of the electric field becomes more complex. This is where electric displacement comes into play.The relationship between the electric field (E), the electric displacement (D), and the polarization (P) of a material is described by the equation: D = εE, where ε is the permittivity of the material. This equation illustrates how electric displacement encompasses not only the free charge density but also the contribution from the bound charges due to the material's polarization.One of the key applications of electric displacement is in capacitor design. Capacitors are essential components in electronic circuits, used to store and release electrical energy. The effectiveness of a capacitor is largely determined by the dielectric material used between its plates. By understanding how electric displacement behaves in various materials, engineers can select appropriate dielectrics to enhance a capacitor's performance, thereby improving the efficiency of electronic devices.Moreover, electric displacement is essential in the formulation of Maxwell's equations, which are fundamental to classical electromagnetism. These equations describe how electric and magnetic fields interact and propagate through space. The inclusion of electric displacement allows for a more accurate representation of how these fields behave in media with varying dielectric properties, which is vital for predicting the behavior of electromagnetic waves in different environments.Understanding electric displacement also has implications in advanced technologies such as wireless communication and radar systems. In these applications, electromagnetic waves travel through various media, and knowing how electric displacement affects wave propagation can lead to better signal integrity and transmission efficiency.In conclusion, the concept of electric displacement is integral to the field of electromagnetism, influencing both theoretical understanding and practical applications. By studying electric displacement, we gain insights into the behavior of electric fields in different materials, paving the way for advancements in technology and engineering. As we continue to explore the complexities of electromagnetism, the importance of electric displacement will undoubtedly remain a focal point in both academic research and industrial innovation.

在电磁学的研究中，电位移的概念在理解电场如何与材料相互作用方面发挥着至关重要的作用。电位移是一个矢量场，表示介质中电荷的分布。它考虑了介电材料中自由和束缚电荷的影响，提供了电场如何通过不同物质传播的更全面的图景。要理解电位移的重要性，我们必须首先考虑电场的基本原理。当电压施加在导体上时，它会产生一个电场，影响带电粒子的运动。然而，当这个电场与介电材料（如橡胶或玻璃）相互作用时，电场的行为变得更加复杂。这时，电位移就发挥了作用。电场（E）、电位移（D）和材料的极化（P）之间的关系由方程D = εE描述，其中ε是材料的介电常数。这个方程说明了电位移不仅包含自由电荷密度，还包括由于材料极化而产生的束缚电荷的贡献。电位移的一个关键应用是在电容器设计中。电容器是电子电路中的基本组件，用于储存和释放电能。电容器的有效性在很大程度上取决于其板间使用的介电材料。通过了解电位移在各种材料中的行为，工程师可以选择合适的介电材料，以增强电容器的性能，从而提高电子设备的效率。此外，电位移在麦克斯韦方程组的表述中也是必不可少的，后者是经典电磁学的基础。这些方程描述了电场和磁场如何相互作用并在空间传播。包含电位移使得能够更准确地表示这些场在具有不同介电特性的介质中的行为，这对于预测电磁波在不同环境中的行为至关重要。理解电位移在无线通信和雷达系统等先进技术中也具有重要意义。在这些应用中，电磁波通过各种介质传播，了解电位移如何影响波传播可以提高信号完整性和传输效率。总之，电位移的概念是电磁学领域不可或缺的一部分，影响着理论理解和实际应用。通过研究电位移，我们能够深入了解电场在不同材料中的行为，为技术和工程的进步铺平道路。随着我们继续探索电磁学的复杂性，电位移的重要性无疑将始终是学术研究和工业创新的焦点。