作者Yangbin (Yangbin)
看板TransPhys
標題[電磁] LR circut
時間Mon May 14 01:11:46 2007
In an LR circut ,the current rises to 40% of its final value in 40 ms .
a)How long does it take to reach 80% of the final value?
b)If R=12 ohm ,what is L.
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