Electrical Engineering - RLC Circuits and Resonance - Discussion

Discussion :: RLC Circuits and Resonance - General Questions (Q.No.2)

2. 

In a series RLC circuit that is operating above the resonant frequency, the current

[A]. lags the applied voltage
[B]. leads the applied voltage
[C]. is in phase with the applied voltage
[D]. is zero

Answer: Option A

Explanation:

No answer description available for this question.

Jagadeesh said: (Dec 20, 2010)  
according to the graph of resonance, above resonant frequency, inductive reactance is more than capacitive reactance, so net is inductive and thus the current lags applied voltage

Balamurugan C said: (May 23, 2011)  
AT RESONANT CONDITION

XL=XC @ RESONANT FREQUENCY

RESONANT FREQUENCY MORE IF XL>XC AND LESS IF XL<XC

HERE IT IS MORE AND IT MEANS XL IS HIGH AND HENCE L IS HIGH (XL=360FL)

L ALWAYS TAKES LAGS THE CURRENT

HENCE THE CURRENT LAGS THE APPLIED VOLTAGE

Abhi said: (Apr 25, 2014)  
At frequencies above the resonance frequency the series RLC circuit. Behaves as an inductive load (evident from equivalent impedance equation) hence current will lag.

Manindra said: (May 19, 2014)  
At resonant frequency, (Xl=Xc).

Above resonant frequency, (Xl>Xc).

Below resonant frequency (Xl<Xc).

Aggrey Kere said: (Jun 26, 2014)  
At resonance, Xl =XC. Thus there no phase angle. Therefore; no lug or lead.

Raj said: (Nov 20, 2014)  
At resonance I in phase with V.

Varshney said: (Dec 9, 2014)  
Above resonance frequency current lags voltage because at this situation XL>XC.

Sandeep Wasnik said: (Jan 28, 2015)  
At resonant condition.

XL = XC @ resonant frequency.

Resonant frequency more if XL>XC and less if XL<XC.

Here it is more and it means XL is high and hence L is high (XL = 360FL).

L always takes lags the current.

Hence the current lags the applied voltage.

Sandeep Sana said: (Jun 2, 2015)  
Resonant frequency XL>XC. So current lags the applied voltage.

Pruthviraj said: (Oct 7, 2016)  
Resonant frequency(fr) = 1/(2 * 3.14 * (LC)1/2,
Take that root.
Given that RLC circuit is above the fr then we know XL > XC in case fr is more then current must be low and that case current should be lags by applied voltage.

Arvind said: (Dec 6, 2017)  
The reactive voltage VL and VC, does it cancel each other at resonance? Can anyone explain?

Nabin Baniya said: (Aug 26, 2018)  
Above resonance frequency, the circuit is inductive.

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