moving coil galvanometer

简明释义

动圈式电流计

英英释义

例句

1.We replaced the old moving coil galvanometer with a digital meter for better accuracy.

我们用数字表替换了旧的动圈电流计以提高准确性。

2.To demonstrate the principle of electromagnetism, the professor used a moving coil galvanometer in her lecture.

为了演示电磁学原理，教授在讲座中使用了动圈电流计。

3.In the laboratory, we calibrated the moving coil galvanometer for accurate voltage readings.

在实验室中，我们对动圈电流计进行了校准，以获得准确的电压读数。

4.The moving coil galvanometer is an essential tool for physics experiments involving electromagnetic principles.

对于涉及电磁原理的物理实验，动圈电流计是一个必不可少的工具。

5.The technician used a moving coil galvanometer to measure the small current flowing through the circuit.

技术员使用动圈电流计来测量电路中流动的小电流。

作文

The moving coil galvanometer is a fundamental instrument in the field of electrical engineering and physics. It is primarily used to measure small electric currents with high precision. The principle behind the moving coil galvanometer is based on the interaction between a magnetic field and a current-carrying coil. When an electric current passes through the coil, it generates a magnetic field that interacts with the external magnetic field, causing the coil to rotate. This rotation is proportional to the amount of current flowing through the coil, allowing for accurate measurements.The construction of a moving coil galvanometer involves several key components. The most critical part is the coil itself, which is typically made of fine wire wound into a loop or series of loops. This coil is suspended in a magnetic field created by permanent magnets. The coil is attached to a pointer that moves over a calibrated scale, providing a visual representation of the current measurement.One of the advantages of using a moving coil galvanometer is its sensitivity. Because the coil can move freely within the magnetic field, even a small amount of current can cause a noticeable deflection of the pointer. This makes it an invaluable tool for experiments that require precise measurements, such as in laboratory settings or in educational environments where students learn about electrical circuits.In addition to its sensitivity, the moving coil galvanometer also has a relatively simple design, which makes it easy to use and maintain. It does not require complex electronics or calibration procedures, making it accessible for both professionals and amateurs alike. However, while the moving coil galvanometer is excellent for measuring direct current (DC), it is less effective for alternating current (AC) measurements without additional modifications.Historically, the moving coil galvanometer has played a significant role in the development of electrical measurement techniques. Invented in the early 19th century, it paved the way for more advanced measuring instruments. Over time, improvements in materials and design have enhanced the performance of the galvanometer, but its basic operating principle remains unchanged.In modern applications, the moving coil galvanometer is often used in conjunction with digital multimeters and oscilloscopes, which provide additional functionalities and capabilities. While digital instruments have largely replaced analog devices in many areas, the moving coil galvanometer still holds educational value and is often used in physics classrooms to demonstrate fundamental concepts in electromagnetism.In conclusion, the moving coil galvanometer is a crucial instrument for measuring electric currents. Its design, sensitivity, and historical significance make it a valuable tool in both educational and professional settings. Understanding how a moving coil galvanometer works not only enhances our knowledge of electrical measurements but also provides insight into the broader principles of physics that govern our understanding of electricity and magnetism.

移动线圈电流计是电气工程和物理学领域的一种基本仪器。它主要用于高精度测量小电流。移动线圈电流计的原理基于磁场与电流通过的线圈之间的相互作用。当电流通过线圈时，它会产生一个与外部磁场相互作用的磁场，导致线圈旋转。这种旋转与通过线圈的电流量成正比，从而允许进行准确的测量。移动线圈电流计的结构涉及几个关键组件。最关键的部分是线圈本身，通常由细导线绕成一个环或多个环。该线圈悬挂在由永久磁铁产生的磁场中。线圈连接到一个指针，指针在刻度上移动，提供电流测量的可视表示。使用移动线圈电流计的一个优点是其灵敏度。由于线圈可以在磁场中自由移动，即使是少量电流也能引起指针明显偏转。这使得它成为需要精确测量的实验中不可或缺的工具，例如在实验室环境或学生学习电路的教育环境中。除了灵敏度，移动线圈电流计的设计相对简单，这使得它易于使用和维护。它不需要复杂的电子设备或校准程序，使其对专业人士和业余爱好者都很容易获得。然而，尽管移动线圈电流计在测量直流电（DC）方面表现出色，但在没有额外修改的情况下，它在交流电（AC）测量中的效果较差。历史上，移动线圈电流计在电气测量技术的发展中发挥了重要作用。它是在19世纪初发明的，为更先进的测量仪器铺平了道路。随着材料和设计的改进，电流计的性能得到了增强，但其基本工作原理仍然没有改变。在现代应用中，移动线圈电流计通常与数字万用表和示波器结合使用，提供额外的功能和能力。尽管数字仪器在许多领域已大大取代了模拟设备，但移动线圈电流计仍具有教育价值，常用于物理课堂上演示电磁学的基本概念。总之，移动线圈电流计是测量电流的重要仪器。它的设计、灵敏度和历史意义使其成为教育和专业环境中的宝贵工具。理解移动线圈电流计的工作原理不仅增强了我们对电气测量的知识，还提供了对支配我们对电和磁理解的更广泛的物理原则的洞察。