图所示电路中，=10V，=10Ω，=20Ω，电压源发出（产生）的功率P为（）. 

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='32670' and id < 2598651 and id<>'2598651' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32670' and id > 2598651 and id<>'2598651' order by id asc limit 5