### Discussion :: RLC Circuits and Resonance - General Questions (Q.No.1)

Bharamu said: (Jul 27, 2011) | |

fr = 1/ 2*Pi*sqrt(L*C) |

Rao said: (Oct 25, 2011) | |

XL=2*Pi*F*L Z=Sqrt of(R^2+(XL-XC)^2) |

Dinesh said: (Feb 27, 2012) | |

fr = 1/ 2*Pi*sqrt(L*C) (or) XL=2*Pi*F*L Z=Sqrt of(R^2+(XL-XC)^2) |

Kananya said: (Mar 9, 2012) | |

We know that formula for Impedence(Z) Z=Sqr root of (R^2+(Xl-Xc)^2) Here R=Resistance Xl=wl (w=2*3.14*f) and l=inductance of a coil Xc=1/wc Here c=capacitance of capaciter Z=Sqr root of (R^2+(Xl-Xc)^2) |

Teju said: (Dec 12, 2012) | |

XL=WL=(2*PI*f)L XC=1/WC=1/(2*PI*f)C where,L=90mh,C=.015microF, f=1200hz and R=10ohm Z=sqrt of(R^2+(XL-XC)^2) |

Rahul Mishra said: (Aug 20, 2013) | |

IN RLC SERIES CIRCUITS WE KNOW: Z = (jw)^2+(jw)R/L+1/LC. |

Mrakovic said: (Nov 12, 2013) | |

fr = 1/2*pi*sqrt of LC. fr = 4331.648. f = fr-1200Hz=3131.64. Z = sqrt of(R^2+(XL-XC)^2). Z = 1617 ohm. |

Babu said: (Dec 26, 2013) | |

We know that, Resonance frequency: Fr = 1/2*pi*sqrt(L*C). Xl = Wl = 2*3.14*f*l. Xc = 1/wc. |

Durai said: (Feb 24, 2014) | |

fr = 1/2*pi*sqrt (L*c). |

Manindra said: (May 19, 2014) | |

Fr = 1/2*pi*sqrt(L*c)=4331.648. f = fr-1200Hz = 3131.64. Xl = Wl = 2*3.14*3131.64*l. Xc = 1/wc. Z = sqrt of(R^2+(XL-XC)^2) = 1616 ohm. |

Aggrey Kere said: (Jun 26, 2014) | |

From R-L-C circuit above, we know that; Z=root of R^2+(XL-XC)^2. but XL=2pi*fr*L. XC=1/2Pi*fr*C. |

Robert said: (Oct 1, 2014) | |

XL=2*3.14*F*L THIS IS THE FORMAL. I WAS ASK TO MAKE SO I CAN FIND UNKNOWN F AND L. MOVE THING AROUND I CAME UP WITH SO ARE THESE RIGHT. F=2*PI*L*XL. L=2*PI*F*XL. |

Prashant said: (Jan 20, 2015) | |

I think result is not coming from above all formula I want real answer from you friends please reply. |

Shwetha said: (Jun 11, 2015) | |

Its (xl-xc). Because xl is greater than xc. |

Rajat Dey said: (Jun 25, 2015) | |

I know above formula but this is very long process and heavy time span. So how can do it quickly? Please help me. |

Shailu said: (Aug 7, 2015) | |

Is it correct? Above explained examples? |

Dinesh said: (Dec 4, 2016) | |

Quicker method needed. |

Puja said: (Jan 15, 2017) | |

Yes, I agree @Prashant. |

Siddu Bhandarkavathe said: (Aug 29, 2017) | |

It is 1/2 π √ LC. |

Hassan said: (Jun 26, 2018) | |

How we can change the units? |

Sushma said: (Jul 4, 2019) | |

1/z = √ [(1/R)^2+(1/Xl-1/Xc)^2] for RLC circuit. |

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