Q1. About steady hand game: Explain why the alarm sounds only when the loop touches the wire.
Q2. The resistance of copper is smaller than that of many other metals. So, most wires are made of copper. But in fact, the resistance of silver is even smaller than that of copper. Why isn't silver used instead of copper for making wires?
Q3. Why the dimmers (used to control the brightness of lamps) are seldom used nowadays?
Science Questions about electricity (10 marks)
2008-02-23 10:21 am
回答 (1)
2008-02-24 12:14 pm
✔ 最佳答案
1.Because it is automatically.2.Because copper is very fast to connect the eletricity so most will making wires by copper.
3.Because it will cost a lot of eletricity and not very pollution make greenhouse effect.
參考: Science books
收錄日期: 2021-05-01 15:55:52
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