RL串联电路接到220V的直流电源时功率为1.2KW,接到220V、50Hz的电源时功率为0.6KW,它的R=( )。
发布时间:2026-01-24
A.40.3Ω
B.40Ω
C.20.3Ω
D.41Ω
试卷相关题目
-
SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69472' and id < 4500049 and id<>'4500049' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69472' and id > 4500049 and id<>'4500049' order by id asc limit 5
湘公网安备:43011102000856号 
