electric field

简明释义

电场

英英释义

例句

1.When two charged plates are placed close together, they create a uniform electric field 电场 between them.

当两个带电平板靠近放置时，它们在之间形成一个均匀的电场 电场。

2.The direction of the electric field 电场 is defined as the direction a positive charge would move.

定义电场 电场的方向是正电荷将要移动的方向。

3.In a vacuum, the electric field 电场 can propagate at the speed of light.

在真空中，电场 电场可以以光速传播。

4.Electric field lines indicate the strength and direction of the electric field 电场.

电场线指示了电场 电场的强度和方向。

5.The strength of the electric field 电场 around a charged object decreases with distance.

带电物体周围的电场 电场强度随着距离的增加而减弱。

作文

The concept of an electric field is fundamental in the study of physics, particularly in the realm of electromagnetism. An electric field is defined as a region around a charged particle where other charged particles experience a force. This invisible field plays a crucial role in how charged objects interact with one another. Understanding the properties and implications of an electric field is essential for grasping various physical phenomena, from the behavior of electrons in atoms to the functioning of everyday electronic devices.To visualize an electric field, imagine placing a positive charge in space. The electric field emanates outward from this charge, affecting any other charges that enter this region. The strength and direction of the electric field can be represented using field lines: these lines point away from positive charges and toward negative charges. The density of these lines indicates the strength of the field; closer lines signify a stronger electric field. This visualization aids in understanding how forces act between charged particles and helps predict their movement.One of the remarkable aspects of an electric field is that it exists even in a vacuum, meaning it does not require a medium to propagate. This characteristic is crucial for understanding how electromagnetic waves travel through space. For instance, light is an electromagnetic wave that propagates through an electric field and a magnetic field, which are interlinked. This interplay of fields is what enables light to travel vast distances across the universe.Moreover, the concept of an electric field is not limited to theoretical physics; it has practical applications in various technologies. For example, capacitors, which are used in electronic circuits, rely on the principles of electric fields. When a voltage is applied across the plates of a capacitor, an electric field is established between them, allowing the device to store energy. This principle is utilized in numerous applications, from power supplies to signal processing in communication devices.In addition to capacitors, the electric field is also pivotal in the operation of cathode-ray tubes, which were once common in televisions and computer monitors. In these devices, an electric field accelerates and directs electrons towards a phosphorescent screen, creating images. Understanding the electric field allows engineers to design more efficient and effective display technologies, even as we transition to newer technologies like LCD and OLED screens.Furthermore, the study of electric fields extends into the realm of medicine, particularly in techniques such as electrocardiography (ECG) and electrophysiology. These methods rely on detecting the electric fields generated by the heart's electrical activity. By analyzing these fields, medical professionals can diagnose various heart conditions, demonstrating the profound impact of electric fields on our understanding of human health.In conclusion, the electric field is a vital concept that bridges theoretical physics and practical applications. From explaining fundamental interactions between charged particles to enabling advanced technologies, the electric field is an essential element of our scientific understanding. As we continue to explore the intricacies of the universe, the significance of electric fields will undoubtedly remain a cornerstone of both research and innovation.

电场的概念在物理学的研究中是基础性的，特别是在电磁学领域。电场被定义为一个带电粒子周围的区域，在这个区域内，其他带电粒子会受到力的作用。这个无形的场在带电物体之间的相互作用中起着至关重要的作用。理解电场的性质和影响对于掌握各种物理现象至关重要，从原子中电子的行为到日常电子设备的功能。为了可视化电场，可以想象在空间中放置一个正电荷。电场从这个电荷向外发散，影响进入该区域的其他电荷。电场的强度和方向可以用场线表示：这些线从正电荷指向负电荷。线的密度表示场的强度；越靠近的线表示电场越强。这种可视化有助于理解带电粒子之间的力如何作用，并帮助预测它们的运动。电场的一个显著特点是它即使在真空中也存在，这意味着它不需要介质来传播。这一特性对理解电磁波如何在空间传播至关重要。例如，光是一种电磁波，它通过电场和磁场传播，这两者是相互关联的。这些场的相互作用使得光能够在宇宙中跨越巨大的距离。此外，电场的概念不仅限于理论物理；它在各种技术中具有实际应用。例如，电容器在电子电路中依赖于电场的原理。当电压施加在电容器的电极上时，电极之间建立了电场，使设备能够存储能量。这一原理被应用于许多领域，从电源到通信设备中的信号处理。除了电容器，电场在阴极射线管的操作中也至关重要，这曾经在电视和计算机显示器中很常见。在这些设备中，电场加速并引导电子朝向荧光屏，从而产生图像。理解电场使工程师能够设计出更高效、更有效的显示技术，即使我们正在过渡到LCD和OLED等新技术。此外，电场的研究还扩展到医学领域，特别是在心电图（ECG）和电生理学等技术中。这些方法依赖于检测心脏电活动所产生的电场。通过分析这些场，医疗专业人员可以诊断各种心脏疾病，展示了电场对我们理解人类健康的深远影响。总之，电场是一个重要的概念，连接了理论物理和实际应用。从解释带电粒子之间的基本相互作用到促进先进技术的发展，电场是我们科学理解的重要组成部分。随着我们继续探索宇宙的复杂性，电场的重要性无疑将继续成为研究和创新的基石。