electric field

简明释义

电场

英英释义

例句

1.The behavior of charged particles is influenced by the surrounding electric field.

带电粒子的行为受到周围电场的影响。

2.Electric field lines indicate the direction and strength of the electric field.

电场线指示了电场的方向和强度。

3.An electric field is generated when a voltage is applied across two plates.

当在两个电极之间施加电压时，会产生电场。

4.The electric field around a charged sphere decreases with distance.

带电球体周围的电场随着距离的增加而减弱。

5.In a vacuum, the strength of the electric field can be calculated using Coulomb's law.

在真空中，电场的强度可以通过库仑定律计算得出。

作文

An electric field is a fundamental concept in physics that describes the influence exerted by electric charges on one another. It is a vector field, meaning it has both magnitude and direction, and it exists around any charged particle. Understanding the electric field is crucial for grasping how electric forces operate and how they affect the motion of charged objects. When a charged object is placed in an electric field, it experiences a force that can cause it to move. This force is proportional to the strength of the field and the amount of charge on the object. The direction of the force depends on the nature of the charge; positive charges are pushed away from other positive charges and attracted to negative charges, while negative charges behave oppositely. The concept of the electric field helps explain various phenomena in our daily lives and in technology. For example, when you rub a balloon on your hair, electrons transfer from your hair to the balloon, giving the balloon a negative charge. This creates an electric field around the balloon, which can attract small pieces of paper or even cause your hair to stand up. This is a practical demonstration of how electric fields interact with matter. 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 charge, and r is the distance from the charge. This equation illustrates that the strength of the electric field decreases with the square of the distance from the charge, meaning that the further away you are from the charge, the weaker the field becomes. In addition to point charges, electric fields can also be generated by continuous distributions of charge, such as in conductors and capacitors. In these cases, the calculation of the electric field becomes more complex, but the underlying principles remain the same. Engineers and physicists utilize these concepts in designing circuits, understanding electromagnetic waves, and developing various technologies like smartphones and computers. Moreover, the concept of the electric field extends beyond static charges. In the realm of electromagnetism, changing electric fields can produce magnetic fields, as described by Maxwell's equations. This interplay between electric and magnetic fields is the foundation of many modern technologies, including transformers and electric motors. In conclusion, the electric field is a vital concept in physics that explains how charged particles interact with each other. Its applications range from simple everyday occurrences to complex technological advancements. By understanding the electric field, we gain insights into the fundamental forces that govern our universe, making it an essential topic for anyone studying physics or engineering.

电场是物理学中的一个基本概念，描述了电荷之间相互作用的影响。它是一个矢量场，意味着它具有大小和方向，并且在任何带电粒子周围存在。理解电场对于掌握电力如何运作以及如何影响带电物体的运动至关重要。当带电物体置于电场中时，它会经历一种力量，这种力量可能导致它移动。这种力量与场的强度和物体上的电荷量成正比。力量的方向取决于电荷的性质；正电荷被其他正电荷推开并被负电荷吸引，而负电荷则表现相反。电场的概念有助于解释我们日常生活和技术中的各种现象。例如，当你用气球摩擦头发时，电子从你的头发转移到气球，使气球带上负电荷。这在气球周围产生了一个电场，可以吸引小纸片，甚至使你的头发竖起来。这是电场如何与物质相互作用的实际演示。从数学上讲，由点电荷（Q）产生的电场强度（E）可以使用库仑定律来描述。公式为E = k * |Q| / r²，其中k是库仑常数，Q是电荷，r是距离电荷的距离。这个方程说明，电场的强度随着距离电荷的平方而减小，这意味着你离电荷越远，场就越弱。除了点电荷，电场还可以由连续的电荷分布生成，例如在导体和电容器中。在这些情况下，电场的计算变得更复杂，但基本原理仍然相同。工程师和物理学家利用这些概念设计电路、理解电磁波以及开发各种技术，如智能手机和计算机。此外，电场的概念超越了静态电荷。在电磁学领域，变化的电场可以产生磁场，正如麦克斯韦方程所描述的那样。电场和磁场之间的这种相互作用是许多现代技术的基础，包括变压器和电动机。总之，电场是物理学中一个重要的概念，解释了带电粒子之间的相互作用。它的应用范围从简单的日常现象到复杂的技术进步。通过理解电场，我们获得了对支配宇宙的基本力量的洞察，使其成为任何学习物理或工程的人的重要主题。