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Grade 12Electromagnetic Induction

At what angular frequency is the voltage amplitude across (a)resistor, (b) inductor, (c) capacitor, in an LCR series circuit at maximum value?

Profile image of ravi vel prashanth
16 Years agoGrade 12
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1 Answer

Profile image of Badiuddin askIITians.ismu Expert
16 Years ago

Dear ravi

current in LC R circuit

i = V/[R2 + (1/wC -wL)2]1/2

 voltage across resistor  = iR  = VR /[R2 + (1/wC -wL)2]1/2

voltage across inductor  = iwL  = VwL /[R2 + (1/wC -wL)2]1/2

voltage across capacitor  = i/wc  = V /wC[R2 + (1/wC -wL)2]1/2

 

for maximum value differentiate each w.r.t w and put equal to zero

 for resister w=1/√LC

for inductor  =√[2C/(2L3 -CL2R2)]

for capacitor=√[(2L-CR2)/2L2 ]

 

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