A.500 W
B.866 W
C.1000 W
D.1988 W
[单选题]图示电路中,u=141sin(314t-30°)V,i=14.1sin(314t-60°)A,这个电路的有功功率P等于( )。A.500WB.866
[单选题]图示电路中,u=141sin(314t-30°)V,i=14.1sin(314t-60°)A,这个电路的有功功率P等于( )。A.500WB.866
[单选题]图示电路中,u=141sin(314t-30°)V,i=14.1sin(314t-60°)A,这个电路的有功功率P等于( )。A.500WB.866
[单选题]图示电路中,u=141sin(314t-30°)V,i=14.1sin(314t-60°)A,这个电路的有功功率P等于( )。A.500WB.866
[单选题]图示电路中,u=141sin(314t-30°)V,i=14.1sin(314t-60°)A,这个电路的有功功率P等于( )。A.500WB.866
[单选题]图示电路中,u=141sin(314t-30°)V,i=14.1sin(314t-60°)A,这个电路的有功功率P等于( )。A.500WB.866
[单选题](2005)图示电路中,u=141sin(314t-30°)V,i=14.1sin(314t-60°)A,这个电路的有功功率P等于:W。()A . 500WB . 866WC . 1000WD . 1988W
[单选题]若电路中某元件两端的电压u=36sin(314t一1800)v,i=5sin(314t~900)A,则该元件是()。A .电阻B .电感C .电容
[单选题]已知u=141sin(314t-150°)V,则()。A .角频率为150°B.最大值为141VC.有效值为141V
[单选题]如图7-20所示电路,u=141sin(314t-30°)V,i=14.1sin(314t-60°)A,这个电路的有功功率P等于()W。A . 500B . 866C . 1000D . 1988