A .电阻
B .电感
C .电容
D .电抗
[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]若电路中某元件两端电压u=100sin(100πt+50°)V,电流I=10sin(100πt+140°)A,则该元件是()。A.电阻B.电感C.电容
[单选题]已知某电路元件的电压u(t)=20sin(314t+30°)V,电流i(t)=5cos(314t+30°)A,这个元件是()。A . 电阻B . 电感C . 电容D . 电压源
[单选题]某负载两端的电压和流过的电流分别u=141sin314tV,i=4.24sin(314t-30°)A,该电路消耗的功率为()。A .300WB .260WC .500WD .600W
[单选题]已知某电路元件的电压u(t)=20sin(314t+30°)V,电流i(t)=5cos(314t+30°)A,这个元件是( )。A.电阻B.电感C.
[单选题]已知某电路元件的电压u(t)=20sin(314t+30°)V,电流i(t)=5cos(314t+30°)A,这个元件是( )。A.电阻B.电感C.
[单选题]已知某电路元件的电压u(t)=20sin(314t+30°)V,电流i(t)=5cos(314t+30°)A,这个元件是( )。A.电阻B.电感C.
[单选题]已知某电路元件的电压u(t)=20sin(314t+30°)V,电流i(t)=5cos(314t+30°)A,这个元件是()。A.电阻B.电感C.电容
[单选题]已知某电路元件的电压u(t)=20sin(314t+30°)V,电流i(t)=5cos(314t+30°)A,这个元件是( )。A.电阻B.电感C.
[单选题]已知某电路元件的电压u(t)=20sin(314t+30°)V,电流i(t)=5cos(314t+30°)A,这个元件是( )。A.电阻B.电感C.