已知正弦电压U=210V，φu=-30O，正弦电流I=10A，电流超前电压60O相位角，则电压电流瞬时值u和i可表示为 。
A: u=210sin(wt-30o)V,i=10sin(wt-900)A
B: u=210sin(wt-300)V,i=10sin(wt+30o)A
C: u=210sin(wt-30o)V,i=10sin(wt+30o)A
D: u=210sin(wt-300)V,i=10sin(wt-90o)A
A: u=210sin(wt-30o)V,i=10sin(wt-900)A
B: u=210sin(wt-300)V,i=10sin(wt+30o)A
C: u=210sin(wt-30o)V,i=10sin(wt+30o)A
D: u=210sin(wt-300)V,i=10sin(wt-90o)A
举一反三
- 已知正弦电压Um=210V，φu=-30O，正弦电流Im=10A，电流超前电压60O相位角，则电压电流瞬时值u和i可表示为( ) A: u=210sin(wt-30o)V , i=10sin(wt-900)A; B: u=210sin(wt-300)V , i=10sin(wt+30o)A; C: u=210sin(wt-30o)V , i=10sin(wt+30o)A; D: u=210sin(wt-300)V , i=10sin(wt-90o)A.
- 已知两个正弦量u=210sin(ωt-30°)v,i=10sin(ωt-90°)A,则u和i的相位差为____
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