若i1=10sin(wt+30°)A,i2=20sin(wt-10°)A,则的相位比超前()
- A20°
- B-20°
- C40°
- D-40°
若i1=10sin(wt+30°)A,i2=20sin(wt-10°)A,则的相位比超前()
1、已知il=30sin(100πt+15°)A,i2=40sin(100πt+
已知il=30sin(100πt+15°)A,i2=40sin(100πt+105°)A,则il+i2=()。
2、两个正弦电流:i1=15sin(100πt+45°),i2=15sin(20
两个正弦电流:i1=15sin(100πt+45°),i2=15sin(200πt-30°),以下说法正确的是()A两者的相位差为75°B两者的有效值相等C两者的周期相同D两者的频率相等
3、已知两个正弦量为i1=10sin(314t+90°)安,i2=10sin(6
已知两个正弦量为i1=10sin(314t+90°)安,i2=10sin(628t+30°)安,则()。Ai1超前i260°Bi1滞后i260°Ci1超前i290°D不能判断相位差
4、两个正弦电流:i1=15sin(314t+45°),i2=10sin(314
两个正弦电流:i1=15sin(314t+45°),i2=10sin(314t-30°),以下说法正确的是()。Ai1超前于i275°Bi1滞后于i275°Ci1超前于i245°Di1滞后于i230°
5、已知i1=30Sin(100πt十I5°),i2=40Sin(100πt十1
已知i1=30Sin(100πt十I5°),i2=40Sin(100πt十105°),则i1+i2的初相位是()。A90°B9°C68.l°D31.9°
6、若i1=8sin(ωt+10o)A,i2=6sin(ωt+30o)A,则其二
若i1=8sin(ωt+10o)A,i2=6sin(ωt+30o)A,则其二者合成后()。AA、幅值等于14,相位角等于40o;BB、i=10sin(ωt-20o);CC、合成电流I=i1+i2,仍是同频率的正弦交流...