p iv power的相關文章
p iv power的相關公司資訊
p iv power的相關商品
![[舒適達人]草本負離子衛生棉-日用型 24cm 6片x22包](https://www.iarticlesnet.com/pub/img/article/36738/1408397369470_s.jpg)
![[舒適達人]草本負離子衛生棉-量少型 18cm 10片x12包](https://www.iarticlesnet.com/pub/img/article/36737/1408397353556_s.jpg)
![[舒適達人]草本負離子衛生棉-護墊型 15cm 16片x12包](https://www.iarticlesnet.com/pub/img/article/36736/1408397343171_s.jpg)
![[舒適達人]草本負離子衛生棉-日用型 24cm 6片x12包](https://www.iarticlesnet.com/pub/img/article/36735/1408397332502_s.jpg)
E and M : About power - Yahoo!知識+
瀏覽：1378
日期：2026-04-23
When we needed to calculate the power loss, why don't we use P=IV, but P=I^2R or v^2/R?Also in a transformer, we calculate the current in the secondary coil by Vs/Vp=Np/Ns, but why not V=IR (given resistance in the secondary coil) ?...看更多
網友正在看
熱門 趨勢 文章
![[Dimension]緬甸解禁後，Facebook 在地球上只剩四個國家待征服](https://www.iarticlesnet.com/pub/img/article/9518/1403838980763_xs.jpg)
![[Dimension]從消費者身上嗅出社群媒體的五大趨勢](https://www.iarticlesnet.com/pub/img/article/8294/1403830151190_xs.jpg)
熱門 免費 文章
![[appstore] Touch LCD – Speaking Alarm Clock 限時免費中](https://www.iarticlesnet.com/pub/img/article/7739/1403827279634_xs.png)
![iPhone 6 說不定就是這個樣子: 跟著流出消息做的像真設計 [圖庫+影片]](https://www.iarticlesnet.com/pub/img/article/3564/1403796686309_xs.jpg)
![[Cydia教學]不用再經iTunes: iPhone iPad檔案 相片 音樂 影片直接拉放](https://www.iarticlesnet.com/pub/img/article/3568/1403796719592_xs.jpg)