25uF=25e-6Ff=50w=2pi*f=314rad/s电导 Y=jwC电流=V|Y|=0.0785A相位角领先90°
Z=1/(2∏fc)=1/(2*3.1415926*50*25*10↑-6）=127.3239(Ω)I=U/Z=10/127.3239=0.0785(A)
I=2πfcu =2×3.1416×50×25×10/1000000 =0.0785A
