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how we can find voltage leads and current lags according to a phasor diagram

Asked by Binshid Ummer 23rd October 2012, 7:09 AM
Answered by Expert
Answer:
first of all let me tell u what exactly a phasor diagram is.
It is a mapping in which a vector is represnted by a line having its length equal to its magnitude and the angle which it makes tells us the phase difference with respect to a refference vector represented by the horizontal axis.
eg. if V = v cos(wt + a)
then if i take X = x cos(wt)
as a reference vector then, the vector V will be making an angle of a with X
thus if V makes an  angle with I in a positive sense then wee say that voltage leads the current
Answered by Expert 24th October 2012, 12:17 PM
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