射燈 50w 12V
係唔係
I = P/V
I = 50/12 = 4.17A
咁條線要幾粗?
裝多幾個射燈條FUSE埋頂唔到??
收錄日期: 2021-04-13 18:00:54
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20110602000051KK00573