额定电压1000V/500V的变压器,空载实验测得损耗为200W,短路实验测得损耗为800W,则负载系数βm=( )时,变压器可获最大效率。
发布时间:2026-01-23
A.1
B.2
C.0.5
D.0.25
试卷相关题目
-
SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69469' and id < 4498988 and id<>'4498988' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69469' and id > 4498988 and id<>'4498988' order by id asc limit 5
湘公网安备:43011102000856号 
