electric field

简明释义

电场

英英释义

例句

1.An electric field can do work on a charge, moving it from one point to another.

电场可以对电荷做功，将其从一个点移动到另一个点。

2.The force experienced by a charged particle in an electric field is proportional to its charge.

带电粒子在电场中所受的力与其电荷成正比。

3.The strength of the electric field decreases with distance from the charged object.

离带电物体越远，电场的强度越小。

4.You can visualize the electric field around a charged object using field lines.

你可以通过场线来可视化带电物体周围的电场。

5.In a parallel plate capacitor, the electric field is uniform between the plates.

在平行板电容器中，板间的电场是均匀的。

作文

The concept of an electric field is fundamental in the study of electromagnetism, a branch of physics that deals with the interactions between charged particles. An electric field can be defined as a region around a charged particle where other charged particles experience a force. This force can either attract or repel the other charges, depending on their nature. Understanding the behavior of electric fields is crucial for various applications, including electronics, telecommunications, and even medical devices.To visualize an electric field, one can imagine the space surrounding a charged object, like a balloon that has been rubbed against hair. The balloon becomes negatively charged, and if you bring a positively charged object, such as a piece of paper, close to it, the paper will be attracted to the balloon. This attraction occurs because the electric field generated by the balloon exerts a force on the positively charged paper. The strength and direction of this force depend on the magnitude of the charges involved and the distance between them.Mathematically, the strength of an electric field (E) created by a point charge (Q) can be described using Coulomb's law. The formula is given by E = k * |Q| / r², where k is Coulomb's constant, |Q| is the absolute value of the charge, and r is the distance from the charge. This equation illustrates that the electric field strength decreases with the square of the distance, meaning that as you move farther away from the charge, the influence of the electric field diminishes significantly.Moreover, electric fields are not just limited to point charges. They can also be produced by continuous charge distributions, such as charged plates in a capacitor. In this case, the electric field between the plates is uniform and directed from the positive plate to the negative plate. This uniform electric field is essential for the operation of capacitors, which store electrical energy and are used in various electronic circuits.In addition to their theoretical significance, electric fields have practical implications in our daily lives. For instance, the functioning of household appliances, such as microwaves and televisions, relies heavily on the principles of electric fields. Engineers design circuits that manipulate these fields to create desired outcomes, such as heating food or displaying images.Furthermore, understanding electric fields is crucial in the field of medicine. Technologies like electrocardiograms (ECGs) and electroencephalograms (EEGs) rely on detecting the electric fields generated by the heart and brain, respectively. By analyzing these fields, medical professionals can gain insights into the health and functioning of these vital organs.In conclusion, the concept of an electric field is a cornerstone of electromagnetism that plays a significant role in both theoretical physics and practical applications. From the simple attraction between charged objects to complex technologies in medicine and electronics, the understanding of electric fields enriches our comprehension of the physical world. As we continue to explore and harness the power of electric fields, we unlock new possibilities for innovation and discovery in various fields of science and technology.

电场的概念是电磁学研究中的基础，电磁学是处理带电粒子之间相互作用的物理学分支。电场可以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。根据带电粒子的性质，这种力可以是吸引或排斥。理解电场的行为对于各种应用至关重要，包括电子学、电信甚至医疗设备。为了可视化电场，可以想象一个带电物体周围的空间，比如一个被头发摩擦过的气球。气球变得带负电，如果你把一个带正电的物体（比如一片纸）靠近它，纸将被气球吸引。这种吸引发生是因为气球产生的电场对带正电的纸施加了力。这个力的强度和方向取决于涉及的电荷的大小以及它们之间的距离。在数学上，由点电荷（Q）产生的电场强度（E）可以用库仑定律来描述。公式为E = k * |Q| / r²，其中k是库仑常数，|Q|是电荷的绝对值，r是距离电荷的距离。这个方程说明，电场强度随着距离的平方而减小，这意味着当你离电荷越来越远时，电场的影响显著减弱。此外，电场不仅限于点电荷。它们还可以由连续的电荷分布产生，例如电容器中的带电板。在这种情况下，板之间的电场是均匀的，并且从正极指向负极。这个均匀的电场对电容器的操作至关重要，电容器用于存储电能并广泛应用于各种电子电路中。除了理论意义，电场在我们的日常生活中也有实际意义。例如，家用电器的运行，如微波炉和电视，都严重依赖电场原理。工程师设计电路以操控这些电场，以创造所需的结果，例如加热食物或显示图像。此外，理解电场在医学领域也至关重要。心电图（ECG）和脑电图（EEG）等技术依赖于检测心脏和大脑产生的电场。通过分析这些电场，医疗专业人员可以获得关于这些重要器官的健康和功能的洞察。总之，电场的概念是电磁学的基石，在理论物理和实际应用中都发挥着重要作用。从带电物体之间的简单吸引到医学和电子学中的复杂技术，理解电场丰富了我们对物理世界的理解。随着我们继续探索和利用电场的力量，我们为科学和技术各个领域的创新和发现打开了新的可能性。