phy
有一個coil 連住個galvnometer跟住有個magnet move入去with constant speed
會有induced emf
咁如果coil d圈大左,
但係no. of turn不變
同一個magnet同一個speed move入去
induced emf會唔會大左.. 你諗下area大左, inductance會有咩影響 inductance會大左..
但係area大左,b-field會唔會細左?? 理論上佢係當你成個area 都係比B-field 插 inductance會大左..
但係area大左,b-field會唔會細左??
L.K. 發表於 7-4-2010 07:21 http://www1.nakuz.com/bbs/images/common/back.gif
Magnetic flux density 冇變 (都係果個 magnet)
所以個 induced emf 會大左 佢可能認為插唔哂/B-field strength 唔係constant 本帖最後由 L.K. 於 11-4-2010 12:11 編輯
哦~~
好似明la... induced emf=A乘dB/dt
A大 dB/dt唔變
所以大左
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