请输入您要查询的字词:

 

单词 electric bell
释义 electric bell
A device in which an electromagnetically operated hammer strikes a bell (see illustration). Pressing the bell-push closes a circuit, causing current to flow from a battery or mains step-down transformer through an electromagnet. The electromagnet attracts a piece of soft iron attached to the hammer, which strikes the bell and at the same time breaks the circuit. The hammer springs back into its original position again, closing the circuit and causing the magnet to attract the soft iron. This process continues until the bell-push is released.

Electric bell
随便看

 

物理辞典收录了3346条物理词条,基本涵盖了常用物理知识及物理英语单词词组的翻译及用法,是物理学习的有利工具。

 

Copyright © 2000-2023 Newdu.com.com All Rights Reserved
更新时间:2025/6/23 19:31:00