中二科學問題(英文)

2008-03-21 6:00 am
1.What is the instrument used to measure the size of the current flowing in a closed circuit?
2.Explain why metals are electrical conductors.
3.What are the three factors that control the value of resistance in resistors.

回答 (1)

2008-03-21 6:36 am
✔ 最佳答案
1. ammeter.
2. metals contain mobile ions
3. the material of the resistor, the length and the thickness of
the resistor.


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