electric resistance

简明释义

电阻

英英释义

例句

1.A multimeter can measure the electric resistance 电阻 of different components.

万用表可以测量不同元件的电阻。

2.The wire has a low electric resistance 电阻, allowing for efficient current flow.

这根导线具有低电阻，允许高效的电流流动。

3.Ohm's law relates voltage, current, and electric resistance 电阻 in a circuit.

欧姆定律将电压、电流和电阻联系在一起。

4.In a series circuit, the total electric resistance 电阻 is the sum of all individual resistances.

在串联电路中，总的电阻是所有单个电阻的总和。

5.When the temperature increases, the electric resistance 电阻 of most conductors also increases.

当温度升高时，大多数导体的电阻也会增加。

作文

In the realm of physics and electrical engineering, understanding the concept of electric resistance is crucial for anyone looking to delve into how electrical circuits function. Electric resistance refers to the opposition that a material offers to the flow of electric current. It is measured in ohms (Ω) and plays a vital role in determining how much current will flow through a circuit when a voltage is applied. The higher the electric resistance, the lower the current for a given voltage, according to Ohm's Law, which states that V = IR, where V is voltage, I is current, and R is resistance.The significance of electric resistance extends beyond theoretical applications; it has practical implications in everyday life. For instance, consider a simple circuit consisting of a battery and a light bulb. The battery provides a certain voltage, and the light bulb has its own electric resistance. When the circuit is closed, the battery pushes current through the bulb. If the electric resistance of the bulb is too high, the current will be minimal, resulting in a dim light. Conversely, if the resistance is low, the bulb will shine brightly as more current flows through.Moreover, electric resistance is not a constant value; it can change with temperature, material composition, and physical dimensions. For example, metals typically have low electric resistance, making them excellent conductors of electricity. In contrast, materials like rubber or glass exhibit high electric resistance, making them good insulators. This property is essential in designing electrical components and systems, ensuring safety and efficiency.In modern technology, electric resistance is a key factor in the performance of various devices. In resistors, which are components specifically designed to provide a certain amount of electric resistance, this property is utilized to control current flow and voltage levels within circuits. Resistors are found in virtually every electronic device, from smartphones to computers, highlighting the ubiquitous nature of electric resistance in our technological landscape.Furthermore, the concept of electric resistance is integral to understanding electrical heating. When current passes through a resistive material, it generates heat due to the energy lost overcoming the electric resistance. This principle is exploited in devices such as electric heaters and toasters, where the heat produced is the desired outcome.In conclusion, electric resistance is a fundamental concept that underpins the behavior of electrical circuits and devices. Its understanding is essential for engineers and scientists alike, as it influences everything from the design of everyday appliances to advanced technological innovations. As we continue to advance in the field of electronics, a firm grasp of electric resistance will remain vital in harnessing the power of electricity efficiently and safely.

在物理学和电气工程领域，理解电阻的概念对于任何希望深入了解电路如何运作的人来说都是至关重要的。电阻是指材料对电流流动所提供的阻力。它以欧姆（Ω）为单位进行测量，并在确定施加电压时电路中会流过多少电流方面发挥着重要作用。根据欧姆定律，电阻越高，给定电压下的电流就越低，欧姆定律表述为V = IR，其中V是电压，I是电流，R是电阻。电阻的重要性不仅限于理论应用；它在日常生活中也有实际意义。例如，考虑一个由电池和灯泡组成的简单电路。电池提供一定的电压，而灯泡具有自己的电阻。当电路闭合时，电池推动电流通过灯泡。如果灯泡的电阻太高，电流将很小，导致灯光昏暗。相反，如果电阻较低，电流流过更多，灯泡将明亮发光。此外，电阻并不是一个恒定值；它可以随着温度、材料成分和物理尺寸而变化。例如，金属通常具有低电阻，使其成为优秀的导体。相比之下，像橡胶或玻璃这样的材料则表现出高电阻，使它们成为良好的绝缘体。这一特性在设计电气组件和系统中至关重要，以确保安全和效率。在现代技术中，电阻是各种设备性能的关键因素。在电阻器中，这些专门设计用于提供一定量电阻的组件被利用来控制电流流动和电压水平。电阻器几乎存在于每个电子设备中，从智能手机到计算机，突显了电阻在我们技术环境中的普遍性。此外，电阻的概念对于理解电加热至关重要。当电流通过一个具有电阻的材料时，由于克服电阻而损失的能量会产生热量。这个原理被利用在电加热器和烤面包机等设备中，其中产生的热量是期望的结果。总之，电阻是一个基础概念，支撑着电路和设备的行为。它的理解对工程师和科学家来说都是必不可少的，因为它影响着从日常家电的设计到先进技术创新的一切。随着我们在电子领域的不断进步，对电阻的深刻理解将在有效和安全地利用电力方面保持至关重要。