### Discussion :: RC Circuits - General Questions (Q.No.26)

Satya Prakash said: (Oct 22, 2011) | |

Its very simple 1/jwc Since j is in denominator it will lag by angle=-90degree |

Deepesh Soni said: (Apr 5, 2013) | |

Current lead in capacitor by 90 so impedance will become -90. |

Amit said: (Mar 10, 2014) | |

Why it is -90 it should be +90? |

Arslan Zahoor said: (Jan 19, 2015) | |

Current is leading to voltage 90 degree in capacitor and current is lagging to voltage 90 degree in inductor. |

Haris said: (Jan 11, 2020) | |

Z = R-jxc as R which is not given, it's negligible Z = -j150. -For polar; r = √ (x^2+y^2), r = √ (+(-150)^2), r = 150, ∠= tangent inverse(y/x), =tan.inv(150), = 90 = -90 and sign - because in capacitive impedance lags by 90. |

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