下图所未电路中，电阻等于（）Ω时取得最大功率。 

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='32630' and id < 2594662 and id<>'2594662' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32630' and id > 2594662 and id<>'2594662' order by id asc limit 5