help~開關掣原理(小學交工課用,要詳細)(20分)
回答 (2)
2009-11-05 5:11 am
✔ 最佳答案
開關掣的原理:主要構造是由兩金屬片組成, 一片為固定接點, 另一為活動接點. 正常未接合時, 兩接點是離開, 電路稱為開路(open circuit), 電路不工作. 將活動接點接上固定接點令電路接合成完整電路, 電路便工作, 稱為閉路(close circuit).
2009-11-05 6:51 am
Switch Is A Controller Of A Circuit,
It Always Have 2 Electrode For Single Pole Electricity Comes From Same Potential.
The Machinism Will Open And Close The Circuit While Pushing The Switch.
It Always Have 2 Electrode For Single Pole Electricity Comes From Same Potential.
The Machinism Will Open And Close The Circuit While Pushing The Switch.
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