electric current

简明释义

电流

英英释义

例句

1.When the electric current 电流 is too high, it can cause the circuit to overheat.

当电流 electric current 过高时，可能会导致电路过热。

2.To measure electric current 电流, you need an ammeter connected in series with the circuit.

要测量电流 electric current，你需要一个与电路串联的安培计。

3.The electric current 电流 in this circuit is controlled by a variable resistor.

这个电路中的电流 electric current 由可变电阻控制。

4.An electric current 电流 flows through a conductor when a voltage is applied.

当施加电压时，导体中会有电流 electric current 流动。

5.The flow of electric current 电流 through the wires powers the entire building.

电线中的电流 electric current 为整栋建筑供电。

作文

Electricity is one of the most significant discoveries in human history, and it has transformed the way we live, work, and communicate. At the heart of this phenomenon is electric current, which refers to the flow of electric charge through a conductor. This flow is typically carried by electrons in a wire, and it is essential for powering our homes, businesses, and electronic devices. Understanding electric current is crucial for anyone interested in physics, engineering, or even everyday technology.To grasp the concept of electric current, we must first consider what electricity is. Electricity is a form of energy resulting from the movement of charged particles. In most cases, these charged particles are electrons, which are negatively charged. When a voltage is applied across a conductor, it creates an electric field that pushes the electrons, causing them to move. This movement of electrons constitutes electric current. The unit of measurement for electric current is the ampere (A), which quantifies the amount of charge passing through a point in a circuit per second.There are two types of electric current: direct current (DC) and alternating current (AC). Direct current flows in one direction only, while alternating current changes direction periodically. DC is commonly used in batteries and electronic devices, whereas AC is the standard form of electricity supplied to homes and businesses. Understanding the differences between these two types of electric current is vital for various applications, from designing circuits to troubleshooting electrical problems.The behavior of electric current can be described using Ohm's Law, which states that the current (I) flowing through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R) of the conductor. This relationship can be expressed with the formula: I = V/R. By understanding this fundamental principle, we can analyze and predict how electric current behaves in different scenarios, making it a cornerstone of electrical engineering.Moreover, the study of electric current is not limited to theoretical concepts; it has practical implications in our daily lives. For instance, when we plug in our smartphones to charge, we rely on electric current to flow from the outlet through the charger and into the device’s battery. Similarly, household appliances such as refrigerators, microwaves, and computers all depend on electric current to function properly. Without a proper understanding of how electric current works, it would be challenging to maintain and repair these essential devices.In conclusion, electric current is a fundamental concept that plays a critical role in modern society. From the way we power our homes to the functioning of our favorite gadgets, the flow of electric charge is at the center of it all. By understanding electric current, we not only gain insight into the principles of electricity but also enhance our ability to engage with the technology that surrounds us. As we continue to innovate and develop new technologies, the importance of electric current will only grow, making it an essential topic for future generations to explore and understand.

电力是人类历史上最重要的发现之一，它改变了我们的生活、工作和交流方式。在这一现象的核心是电流，它指的是电荷通过导体的流动。这种流动通常由导线中的电子携带，对于为我们的家庭、企业和电子设备供电至关重要。理解电流对于任何对物理学、工程学或甚至日常技术感兴趣的人来说都是至关重要的。要掌握电流的概念，我们必须首先考虑电是什么。电是一种能量形式，源于带电粒子的运动。在大多数情况下，这些带电粒子是电子，它们带有负电荷。当在导体两端施加电压时，会产生一个电场，推动电子移动，从而导致它们流动。这种电子的运动构成了电流。电流的测量单位是安培（A），它量化了每秒通过电路某一点的电荷量。电流有两种类型：直流（DC）和交流（AC）。直流电仅朝一个方向流动，而交流电则周期性地改变方向。直流电通常用于电池和电子设备，而交流电是供给家庭和企业的标准电力形式。理解这两种类型的电流之间的区别对于各种应用至关重要，从设计电路到排除电气故障。电流的行为可以用欧姆定律来描述，该定律指出，在两个点之间流动的电流（I）与这两个点之间的电压（V）成正比，与导体的电阻（R）成反比。这个关系可以用公式表示：I = V/R。通过理解这个基本原理，我们可以分析和预测电流在不同场景中的行为，使其成为电气工程的基石。此外，研究电流不仅限于理论概念；它在我们的日常生活中具有实际意义。例如，当我们将智能手机插入充电时，我们依赖于电流从插座流经充电器进入设备的电池。同样，冰箱、微波炉和计算机等家用电器也都依赖于电流正常运作。如果没有对电流如何工作的正确理解，维护和修理这些必需设备将会非常困难。总之，电流是一个基础概念，在现代社会中发挥着关键作用。从我们为家庭供电的方式到我们最喜欢的小工具的功能，电荷的流动是这一切的中心。通过理解电流，我们不仅获得了对电力原理的深入了解，还增强了我们与周围技术互动的能力。随着我们继续创新和开发新技术，电流的重要性只会增加，使其成为未来几代人探索和理解的一个重要主题。