04 PP1 PHY

[S]【YU】

原帖由 L.K. 於 15-4-2008 16:36 發表
原來係咁...
祝你身體健康

咁算咩意思?

L.K.

多謝你解答我ge問題....
唔係衰野..

唔想身體健康就祝你學業進步la..

piyopiyo

原帖由 L.K. 於 15-4-2008 17:03 發表
多謝你解答我ge問題....
唔係衰野..

唔想身體健康就祝你學業進步la..

得罪當權者會好大鑊[[tk_30]]

早排Adamsteve 曾承認 [YU] 係佢頭號打手 [[tk_02]]  好黑暗[[tk_30]]

包包 klau1001

原帖由 piyopiyo 於 15-4-2008 14:07 發表
04年?=.=...點解我無印象ge...我前日先做完04 =.=...

正常...
因為這是03 CE PP= ="

原帖由[S]【YU】於 15-4-2008 16:20 發表
commutator is not required in this application, because the direction of current flow makes no difference.
We need a commutator only when we want to make a DC generator.
So the essential parts should be the coil and magnet only.

那是在問essential component of motor,唔係b)果個發電機
DC motor 同 DC generator 都要 commutator
所以commutator 都 accept
(carbon brush, iron core都ok)

[from marking]