absolute permittivity

简明释义

1. 电容率; 2. 介电常数;

英英释义

例句

1.Materials with high absolute permittivity can store more electric energy.

具有高绝对介电常数的材料可以存储更多的电能。

2.The formula for capacitance includes the absolute permittivity of the medium between the plates.

电容的公式包括板间介质的绝对介电常数。

3.When calculating capacitance, the absolute permittivity of the dielectric material must be considered.

在计算电容时，必须考虑介质材料的绝对介电常数。

4.The value of absolute permittivity is crucial in determining how electric fields interact with materials.

值的绝对介电常数在确定电场如何与材料相互作用中至关重要。

5.In vacuum, the absolute permittivity is approximately 8.854 x 10^-12 F/m.

在真空中，绝对介电常数大约为8.854 x 10^-12法拉每米。

作文

In the realm of physics and electrical engineering, the concept of absolute permittivity plays a crucial role in understanding how electric fields interact with materials. Defined as the measure of a material's ability to permit electric field lines to pass through it, absolute permittivity is denoted by the symbol ε (epsilon). This property is essential in the study of capacitors, dielectric materials, and electromagnetic waves. To delve deeper into the significance of absolute permittivity, we must first understand its relationship with other fundamental concepts in electromagnetism. The permittivity of free space, often referred to as ε₀, serves as a baseline for measuring the permittivity of different materials. It is approximately equal to 8.85 x 10⁻¹² F/m (farads per meter). When a material is introduced into an electric field, its absolute permittivity can be expressed as ε = εᵣ * ε₀, where εᵣ is the relative permittivity or dielectric constant of the material. This equation illustrates how the material's properties influence its ability to store electric energy. The practical implications of absolute permittivity are vast. For instance, in the design of capacitors, engineers must consider the dielectric material used between the capacitor plates. Materials with high absolute permittivity can store more charge at a given voltage, making them ideal for applications requiring efficient energy storage. On the other hand, materials with low absolute permittivity may lead to less efficient capacitors, potentially impacting the performance of electronic devices. Moreover, the concept of absolute permittivity extends beyond static electric fields. In alternating current (AC) circuits and radio frequency applications, the behavior of materials under varying electric fields becomes increasingly important. The complex permittivity, which includes both the real and imaginary components, allows engineers to predict how materials will respond to time-varying fields. This understanding is vital for designing antennas, transmission lines, and other components in communication systems. Another area where absolute permittivity is significant is in the propagation of electromagnetic waves. The speed of light in a medium is inversely related to the square root of the absolute permittivity and permeability of that medium. Therefore, knowing the absolute permittivity of a material helps engineers calculate how fast signals will travel through different media, which is essential for telecommunications and radar technologies. In conclusion, absolute permittivity is a fundamental property that influences various aspects of electrical engineering and physics. Its impact on energy storage, signal propagation, and material selection cannot be overstated. As technology continues to advance, a deeper understanding of absolute permittivity will enable engineers and scientists to develop more efficient and innovative solutions in the ever-evolving landscape of electronics and communications. By mastering this concept, one can appreciate the intricate relationship between materials and electric fields, paving the way for future discoveries in the field of electromagnetism.

在物理学和电气工程领域，绝对电容率的概念在理解电场与材料之间的相互作用中发挥着至关重要的作用。绝对电容率被定义为材料允许电场线通过其的能力的度量，通常用符号ε（epsilon）表示。这个特性在电容器、介电材料和电磁波的研究中是必不可少的。要深入了解绝对电容率的重要性，我们必须首先理解它与电磁学中其他基本概念之间的关系。自由空间的电容率，通常称为ε₀，作为测量不同材料电容率的基准。它大约等于8.85 x 10⁻¹² F/m（法拉每米）。当材料被引入到电场中时，它的绝对电容率可以表示为ε = εᵣ * ε₀，其中εᵣ是材料的相对电容率或介电常数。这个方程说明了材料的特性如何影响其储存电能的能力。绝对电容率的实际意义是广泛的。例如，在电容器的设计中，工程师必须考虑用于电容器板之间的介电材料。具有高绝对电容率的材料可以在给定电压下储存更多的电荷，使它们非常适合需要高效能量储存的应用。另一方面，具有低绝对电容率的材料可能导致电容器效率较低，从而可能影响电子设备的性能。此外，绝对电容率的概念超越了静态电场。在交流（AC）电路和射频应用中，材料在变化电场下的行为变得越来越重要。复电容率，包括实部和虚部，使工程师能够预测材料对时间变化电场的响应。这种理解对于设计天线、传输线和通信系统中的其他组件至关重要。绝对电容率在电磁波传播中的重要性也是显而易见的。光在介质中的速度与该介质的绝对电容率和磁导率的平方根成反比。因此，了解材料的绝对电容率有助于工程师计算信号在不同介质中的传播速度，这对于电信和雷达技术至关重要。总之，绝对电容率是影响电气工程和物理学各个方面的基本属性。它对能量储存、信号传播和材料选择的影响不容小觑。随着技术的不断进步，对绝对电容率的更深入理解将使工程师和科学家能够在不断发展的电子和通信领域开发出更高效和创新的解决方案。通过掌握这一概念，人们可以欣赏材料与电场之间的复杂关系，为电磁学领域未来的发现铺平道路。