下图所示正弦交流电路中，电流表读数为2A,电压表VI读数为17V,V2读数为10V,电源电压有效值为（）。 

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32632' and id < 2594819 and id<>'2594819' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32632' and id > 2594819 and id<>'2594819' order by id asc limit 5