rheostat

简明释义

英[ˈriːəstæt]美[ˈriəˌstæt]

n. [电] 变阻器

英英释义

单词用法

同义词

反义词

例句

1.A new kind of stepping integrated electronic rheostat is put forward.

提出一种新型的步进式集成电子变阻器。

2.An on-off switch with pilot light, reversing switch and a power rheostat are mounted on the base.

开关还附有指示灯，转换装置及电阻在底座上。

3.A variable resister is called a rheostat.

可以调节的电阻器叫做变阻器。

4.Some switches also contain a rheostat to control the brightness of the instrument panel lights.

一些开关也包含一个可变电阻器，控制仪表板灯的灯光亮度。

5.If the resistance wire is burnt out, change another field rheostat.

如电阻丝烧断，应更换磁场变阻器。

6.The object-oriented technology based procedure design for DF series locomotive water rheostat load test was described. Some problems arisen in software design were discussed.

介绍了基于面向对象技术的东风系列机车水阻试验系统软件设计以及软件设计中的若干技术问题。

7.A spiral rheostat which is very high in resolution capacity is designed.

本文设计出了一个调节分辨率极高的螺旋调节变阻器。

8.The technician adjusted the rheostat to control the brightness of the lights in the theater.

技术人员调整了电位器以控制剧院灯光的亮度。

9.In the lab, we used a rheostat to vary the resistance in the circuit for our experiments.

在实验室，我们使用电位器来改变电路中的电阻进行实验。

10.The old radio had a rheostat that allowed users to fine-tune the volume.

那台老式收音机有一个电位器，允许用户微调音量。

11.He replaced the broken rheostat in his model train set to restore functionality.

他更换了模型火车套件中坏掉的电位器以恢复功能。

12.A rheostat can be used in dimmer switches to adjust lighting levels in a home.

在家用调光开关中可以使用电位器来调整照明水平。

作文

In the world of electronics, there are numerous components that play critical roles in the functioning of devices. One such component is the rheostat, which is a type of variable resistor. It is used to control the flow of electric current by adjusting resistance within a circuit. The rheostat is particularly useful in applications where the adjustment of current is necessary, such as in dimming lights or controlling the speed of motors. Understanding the function and application of a rheostat can provide valuable insights into electrical engineering and circuit design. A rheostat consists of a resistive element and a sliding contact, known as a wiper, that moves along the resistive material. By changing the position of the wiper, the user can vary the resistance and, consequently, the current flowing through the circuit. This ability to adjust resistance makes the rheostat an essential tool in various electronic applications. For example, in a simple circuit with a light bulb, incorporating a rheostat allows users to dim the light by reducing the current passing through the bulb. Moreover, rheostats are commonly used in educational settings for demonstrations on how resistance affects current. By using a rheostat, students can visually observe the relationship between resistance and current flow, reinforcing their understanding of Ohm's Law. This hands-on experience is invaluable for aspiring engineers and electricians, as it provides practical knowledge that complements theoretical concepts. In addition to their use in educational environments, rheostats find applications in various industries. For instance, in the automotive sector, they are often employed in controlling the speed of windshield wipers or adjusting the brightness of dashboard lights. In manufacturing, rheostats are utilized in machinery to regulate motor speeds, ensuring optimal performance and efficiency. Despite the advantages of rheostats, it is essential to note that they have some limitations. One significant drawback is that they can generate heat due to the resistance they introduce into the circuit. This heat generation can lead to energy loss and, in some cases, may require additional cooling mechanisms to prevent overheating. As technology advances, newer devices such as digital potentiometers and solid-state controllers are being developed, which offer more efficient alternatives to traditional rheostats. In conclusion, the rheostat is a vital component in the field of electronics that allows for the control of electric current through adjustable resistance. Its applications range from simple household devices to complex industrial machinery. Understanding how a rheostat works and its practical uses enhances our comprehension of electrical circuits and engineering principles. As we continue to innovate and develop new technologies, the rheostat remains a fundamental part of the electronic landscape, bridging the gap between theory and practice in the world of electricity.

在电子世界中，有许多组件在设备的功能中发挥着关键作用。其中一个组件是电位器，它是一种可变电阻器。它用于通过调整电路中的电阻来控制电流的流动。电位器在需要调整电流的应用中尤为有用，例如调暗灯光或控制电动机的速度。理解电位器的功能和应用可以为电气工程和电路设计提供宝贵的见解。 电位器由一个电阻元件和一个滑动接触点（称为刮刀）组成，刮刀沿着电阻材料移动。通过改变刮刀的位置，用户可以改变电阻，从而改变流经电路的电流。这种调整电阻的能力使得电位器成为各种电子应用中的重要工具。例如，在一个简单的带有灯泡的电路中，加入电位器可以通过减少流经灯泡的电流来调暗灯光。 此外，电位器通常在教育环境中用于演示电阻如何影响电流。通过使用电位器，学生可以直观地观察电阻与电流流动之间的关系，从而加深他们对欧姆定律的理解。这种实践经验对于有志于成为工程师和电工的人来说是无价的，因为它提供了与理论概念相辅相成的实用知识。 除了在教育环境中的应用外，电位器还在各个行业中找到了应用。例如，在汽车行业，它们通常用于控制挡风玻璃刮水器的速度或调整仪表盘灯光的亮度。在制造业中，电位器用于调节机器中的电动机速度，以确保最佳性能和效率。 尽管电位器有其优点，但也必须注意它们的一些局限性。一个显著的缺点是，由于它们在电路中引入的电阻，它们可能会产生热量。这种热量的产生可能导致能量损失，并且在某些情况下，可能需要额外的冷却机制以防止过热。随着技术的进步，新型设备如数字电位器和固态控制器正在开发，它们提供了比传统电位器更高效的替代方案。 总之，电位器是电子领域中的一个重要组件，它通过可调电阻控制电流。它的应用范围从简单的家用设备到复杂的工业机械。理解电位器的工作原理及其实际用途增强了我们对电路和工程原理的理解。随着我们继续创新和开发新技术，电位器仍然是电子领域的基础部分，架起了电力世界中理论与实践之间的桥梁。