如图所示，已知U=380V，f=50,取C使开关K闭合与断开时电流表读数均为0.5A,且闭合后电压与电流同相位，则L为（） 

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32673' and id < 2599099 and id<>'2599099' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32673' and id > 2599099 and id<>'2599099' order by id asc limit 5