capacitance

简明释义

英[kəˈpæsɪtəns]美[kəˈpæsɪtəns]

n. [电] 电容；电流容量

复 数 c a p a c i t a n c e s

英英释义

单词用法

同义词

反义词

例句

1.SOI technology is used to reduce the device capacitance and increase transistor performance.

SOI技术用于减少器件电容和提高晶体管性能。

2.Capacitance of conductor capacitor electric field energy and energy density.

导体的电容；电容器。电场的能量和能量密度。

3.The elements of interest for this discussion are the source capacitance (CS) and the feedback capacitance (CF).

这时，我们感兴趣的元件是源电容（CS）和反馈电容（CF）。

4.In general, as the source capacitance increases, the noise gain also increases.

一般而言，当源电容增大时，噪声增益也会增大。

5.The soak time allows any circuit capacitance to settle before the measurement begins.

在保温时间内所有的电路电容在测量开始前稳定下来。

6.Noise can also be coupled to a different switch through its contact-coil capacitance if it is driven by the same coil supply.

如果另一个开关是由相同的线圈电源驱动的，噪声则可通过其“触点-线圈”电容耦合至该开关。

7.Capacitance depends on the size, shape and separation between any two conductors.

电容取决于任何两个导体之间尺寸，形状和他们之间的距离。

8.To calculate the total capacitance in series, you need to use the reciprocal formula.

要计算串联电路中的总电容，需要使用倒数公式。

9.The capacitance of this circuit is too low for efficient operation.

这个电路的电容对于高效运行来说太低了。

10.Increasing the area of the plates will increase the capacitance of the capacitor.

增加电容器板的面积将增加其电容。

11.A higher capacitance allows a capacitor to store more charge.

更高的电容使电容器能够储存更多的电荷。

12.The capacitance of a capacitor is measured in farads.

电容器的电容以法拉为单位。

作文

Understanding the concept of capacitance is essential for anyone studying electrical engineering or physics. Capacitance, defined as the ability of a system to store an electric charge, plays a crucial role in various applications, from simple circuits to complex electronic devices. In essence, it measures how much electric charge can be stored per unit voltage. The unit of capacitance is the farad (F), which is a relatively large unit, so in practice, we often deal with microfarads (µF) or picofarads (pF). To grasp the significance of capacitance, one must first understand the structure of a capacitor, which is a device specifically designed to store electrical energy. A typical capacitor consists of two conductive plates separated by an insulating material known as a dielectric. When a voltage is applied across the plates, an electric field develops, and charge accumulates on the plates. The amount of charge that can be stored is directly proportional to the voltage applied and the capacitance of the capacitor itself. One of the most interesting aspects of capacitance is its dependence on physical factors such as the surface area of the plates, the distance between them, and the properties of the dielectric material used. For instance, increasing the surface area of the plates allows more charge to be stored, while reducing the distance between them enhances the electric field strength, thereby increasing capacitance. Additionally, different dielectric materials have varying abilities to store charge; materials with high dielectric constants can significantly increase the capacitance of a capacitor. In practical applications, capacitance is vital in timing circuits, filters, and energy storage systems. For example, in timing circuits, capacitors charge and discharge at predictable rates, allowing for the creation of oscillating signals. In audio equipment, capacitors are used in crossover networks to filter out unwanted frequencies, ensuring that speakers receive only the appropriate signals. Furthermore, in power supply systems, capacitors smooth out voltage fluctuations, providing a stable output. Moreover, understanding capacitance is crucial when designing circuits. Engineers must calculate the required capacitance to ensure that components function correctly. If the capacitance is too low, the circuit may not operate effectively, leading to issues such as signal distortion or power loss. Conversely, excessive capacitance can cause delays in circuit response times or even damage components due to overloading. In conclusion, capacitance is a fundamental concept in the field of electronics and electrical engineering. Its ability to store and manage electrical energy is indispensable in countless applications, making it a cornerstone of modern technology. By understanding the principles of capacitance, students and professionals alike can design better circuits and innovate new technologies that rely on this critical property of materials. As we continue to advance in the realm of electronics, the importance of capacitance will undoubtedly grow, paving the way for more efficient and powerful devices in the future.

理解电容的概念对于任何学习电气工程或物理的人来说都是至关重要的。电容被定义为一个系统存储电荷的能力，它在从简单电路到复杂电子设备的各种应用中发挥着关键作用。实质上，它测量每单位电压可以存储多少电荷。电容的单位是法拉（F），这是一个相对较大的单位，因此在实际应用中，我们通常处理微法（µF）或皮法（pF）。要理解电容的重要性，首先必须了解电容器的结构，电容器是一种专门设计用于存储电能的设备。典型的电容器由两个导电板和一个称为介电材料的绝缘材料组成。当电压施加在板上时，会形成电场，电荷在板上积累。可以存储的电荷量与施加的电压和电容器本身的电容成正比。电容的一个有趣方面是它对物理因素的依赖，例如板的表面积、板之间的距离以及所使用的介电材料的特性。例如，增加板的表面积允许存储更多的电荷，而减少它们之间的距离则增强电场强度，从而增加电容。此外，不同的介电材料具有不同的存储电荷的能力；具有高介电常数的材料可以显著提高电容器的电容。在实际应用中，电容在定时电路、滤波器和能量存储系统中至关重要。例如，在定时电路中，电容器以可预测的速度充电和放电，从而允许创建振荡信号。在音频设备中，电容器用于分频网络，以过滤掉不必要的频率，确保扬声器仅接收适当的信号。此外，在电源系统中，电容器平滑电压波动，提供稳定的输出。此外，理解电容对于电路设计至关重要。工程师必须计算所需的电容以确保组件正常工作。如果电容过低，电路可能无法有效运行，导致信号失真或功率损失。相反，过多的电容可能会导致电路响应时间延迟，甚至由于过载而损坏组件。总之，电容是电子和电气工程领域的一个基本概念。它存储和管理电能的能力在无数应用中是不可或缺的，使其成为现代技术的基石。通过理解电容的原理，学生和专业人士都可以设计更好的电路，并创新依赖于这一材料关键属性的新技术。随着我们在电子领域的不断进步，电容的重要性无疑将会增长，为未来更高效、更强大的设备铺平道路。