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简答题计算题:已知某正弦电流i1=15sin(314t-π/6),i2=20sin(314t+π/2),试求它们的相位差,并说明那个超前?
  • Φ=Φ1-Φ2=(314t-π/6)-(314t+π/2)=-2π/3<0
    i2超前i12π/3,相位差2π/3
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