absolute permittivity

简明释义

绝对电容率

英英释义

例句

1.To design effective antennas, engineers must consider the absolute permittivity of the surrounding materials.

为了设计有效的天线，工程师必须考虑周围材料的绝对介电常数。

2.The equation for the speed of light in a medium involves the absolute permittivity of that medium.

光在介质中的传播速度公式涉及该介质的绝对介电常数。

3.The value of absolute permittivity is crucial for calculating the capacitance of a capacitor.

计算电容器的电容时，绝对介电常数的数值至关重要。

4.Different materials have different values of absolute permittivity, affecting their use in electronics.

不同材料具有不同的绝对介电常数，这影响它们在电子设备中的使用。

5.In a vacuum, the absolute permittivity is denoted by ε₀.

在真空中，绝对介电常数用ε₀表示。

作文

In the field of electromagnetism, the concept of absolute permittivity plays a crucial role in understanding how electric fields interact with materials. Absolute permittivity is defined as a measure of how much electric field is 'permitted' to pass through a medium. It is an intrinsic property of materials that determines their ability to store electrical energy in an electric field. The higher the absolute permittivity, the more electric field lines can penetrate the material, indicating that the material can store more electric energy.To better understand absolute permittivity, it is essential to differentiate it from relative permittivity. While absolute permittivity refers to the ability of a specific material to permit an electric field, relative permittivity is a dimensionless quantity that compares the absolute permittivity of a material to that of a vacuum. The absolute permittivity of free space, often denoted as ε0, is approximately 8.85 x 10^-12 farads per meter. This constant serves as a baseline for determining the absolute permittivity of other materials.The importance of absolute permittivity becomes apparent in various applications, such as capacitors, where the ability to store charge is directly related to the absolute permittivity of the dielectric material used. For instance, when designing capacitors, engineers must select materials with high absolute permittivity to enhance the capacitance and efficiency of the device. This selection process is critical in industries ranging from consumer electronics to power systems, where reliable energy storage is paramount.Moreover, the absolute permittivity of materials can change with frequency. At different frequencies, the polarization mechanisms within a material may respond differently, leading to variations in its absolute permittivity. This frequency dependence is particularly significant in high-frequency applications, such as radio frequency (RF) and microwave technologies, where understanding the behavior of materials under varying conditions is essential for effective design and performance.Another aspect worth considering is the temperature dependence of absolute permittivity. As temperature changes, the molecular structure and dynamics of a material can alter its ability to polarize in response to an electric field. Consequently, the absolute permittivity may increase or decrease with temperature changes, which can impact the performance of electronic components and systems.In summary, absolute permittivity is a fundamental concept in electromagnetism that significantly influences the behavior of materials in electric fields. Understanding its implications allows engineers and scientists to design more efficient electronic devices and systems. From capacitors to communication technologies, the role of absolute permittivity is indispensable in advancing modern technology. As research continues to explore new materials and their properties, the significance of absolute permittivity will only grow, driving innovations across various technological fields.

在电磁学领域，绝对介电常数的概念在理解电场与材料的相互作用中起着至关重要的作用。绝对介电常数被定义为通过介质的电场被“允许”的程度。它是材料的一个内在属性，决定了它们在电场中储存电能的能力。绝对介电常数越高，电场线穿透材料的数量就越多，这表明该材料能够储存更多的电能。为了更好地理解绝对介电常数，有必要将其与相对介电常数区分开来。虽然绝对介电常数指的是特定材料允许电场的能力，但相对介电常数是一个无量纲的量，它将某种材料的绝对介电常数与真空的绝对介电常数进行比较。自由空间的绝对介电常数，通常表示为ε0，约为8.85 x 10^-12法拉每米。这个常数作为确定其他材料绝对介电常数的基准。绝对介电常数的重要性在于各种应用中，比如电容器，其中储存电荷的能力直接与所用介电材料的绝对介电常数相关。例如，在设计电容器时，工程师必须选择具有高绝对介电常数的材料，以增强设备的电容和效率。这一选择过程在从消费电子到电力系统的各个行业中都是至关重要的，因为可靠的能量储存至关重要。此外，材料的绝对介电常数可能会随频率变化而变化。在不同频率下，材料内部的极化机制可能会以不同的方式响应，从而导致其绝对介电常数的变化。这种频率依赖性在高频应用（例如射频和微波技术）中特别重要，在这些应用中，理解材料在不同条件下的行为对于有效的设计和性能至关重要。另一个值得考虑的方面是绝对介电常数的温度依赖性。随着温度的变化，材料的分子结构和动态可能会改变其在电场中极化的能力。因此，绝对介电常数可能会随着温度的变化而增加或减少，这可能会影响电子元件和系统的性能。总之，绝对介电常数是电磁学中的一个基本概念，对材料在电场中的行为产生重大影响。理解其影响使工程师和科学家能够设计出更高效的电子设备和系统。从电容器到通信技术，绝对介电常数的作用在推动现代技术发展中不可或缺。随着研究继续探索新材料及其特性，绝对介电常数的重要性只会增加，推动各个技术领域的创新。