A .25°
B .95°
C .115°
[单选题]u=-100sin(6πt+10°)V超前i=5cos(6πt-15°)A的相位差是()A.25°B.95°C.115°
[单选题]u=-100sin(6πt+10°)V超前i=5cos(6πt-15°)A的相位差是()A.25°B.95°C.115°
[单选题]u=-100sin(6πt+10°)V超前i=5cos(6πt-15°)A的相位差是()A.25°B.95°C.115°
[单选题]在RC串联电路中,已知外加电压:u(t)=20+90sin(ωt)+30sin(3ωt+50°)+10sin(5ωt+10°)V电路中电流:i(t)=
[填空题] 已知il=30sin(100πt+15°)A,i2=40sin(100πt+105°)A,则il+i2=()。
[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.