### Discussion :: RL Circuits - General Questions (Q.No.3)

Ranjit said: (Sep 2, 2011) | |

No power is dissipated in L... So P=(Vpow2)/R |

Soundarya said: (Sep 27, 2011) | |

There is no dissipation of power at inductor.so p=v^2/R =(24*24)/45=12.8 is the answer |

C.P. Borkar said: (Nov 25, 2011) | |

First calculate I=V/R =24/45 = O.533 THEN P=VI P=24*0.533 P=12.8 |

Hareshwar said: (Jan 20, 2012) | |

Good answer. |

Sindhu Priya said: (Aug 27, 2012) | |

I=V/R=24/45=0.533 P=VI=24*0.533=12.8 |

Lochana.Vyas said: (Apr 24, 2013) | |

As they said only true power so inductance value will not be there and only purely resistive load is used:-. V^2/R = (24) ^2/45 = 12.8W. |

Nasim said: (Sep 1, 2013) | |

Please say why there is no power dissipation in the inductor? |

Arun said: (Oct 29, 2013) | |

Impedance z = 44.9 ohm. I = V/Z = 0.534 A. TRUE POWER = V*I*COS(PHI)=12.78 VOLT. PHI = TAN inv(R/Xl) = 2.34. |

Sudhi. said: (Dec 10, 2014) | |

If there is no losses in the inductor it is simple. This means no equivalent series or parallel are. Use 2pi x f x L to get the reactance, and then the current by ohms law. There is no power dissipated. Current is drawn but it recirculates without any heating. The inductor charges and discharges. |

Rajan said: (Nov 16, 2016) | |

Another way is total I * V. There is a power dissipated in the resistor and also low lost in Inductor. So both need to be considered ! In parallel circuit Total current It= IL +Ir but since they are not in the same phase so cannot plus directly. It^2 = IL^2 + Ir^2. Ir = V/R =24/45 = 0.533. IL = V/Xl =24/1100 = 0.0218. It = sqr(IL^2 +Ir^2) = sqr(0.5333*0.5333 +0.02182*0.02182) = 0.53345. It = 0.53345 ampere. Power = VIt = 24 * 0.5334 = 12.80 (more accurate). |

Priti said: (Apr 9, 2017) | |

Ir=24/45(voltage equal in parallel). Then, Real power =Ir^2 * 45 = 12.8. |

Pawan said: (Aug 12, 2018) | |

Why is inductive reactance not considered here? Anyone, please explain. |

#### Post your comments here:

Name *:

Email : (optional)

» Your comments will be displayed only after manual approval.