高一基礎物理:Realtime－ 2015年假公告, 2015年假幾天, 2015年假公告人事行政局, 2015年假放幾天, 2015行事曆, 2015 國定假日, 2015年假日期, 2015年假9天, 明年假期2015, 2015 年假,

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高一基礎物理

May 13th 2014, 02:05

請各位大大幫忙解析一下，謝謝!

有一變壓器原線圈與副線圈札數比為1:60 ；若原線圈的電壓110伏特，電流100A；副線圈電流為1安培，變壓器損失的電能轉為熱，則此變壓器效率為何? (A)50% (B)60% (C)66% (D)80% (E)90%

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