2013/01/26

Q. How to make a light bulb to light use?

needs: cell + Bulb + Connecting wires
                   
             It changes chemical energy to electrical energy 

Battery (電池組) is a group of cells.

Circuit (電路) 
       ↓                                                       ↓
1. 閉合電路                                 2. 斷路
    close circuit                                  open circuit 
> complete circuit                         > incomplete circuit 
> without gap                                   > with gap 


Switch (開關)









            






                                                                       







metal = good electrical conductor 導電體

non-metal = poor electrical conductor [Insulator 絕緣體]

*************************************************
1. Materials that allow electricity to flow through are called electrical conductor.

2. Materials that do not allow electricity to flow through are called electrical insulator.

3. Metals can conduct electricity well. 

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B. G.