Electrical Engineering - Capacitors - Discussion
Discussion Forum : Capacitors - General Questions (Q.No. 2)
2.
A capacitor and a resistor are connected in series to a sine wave generator. The frequency is set so that the capacitive reactance is equal to the resistance and, thus, an equal amount of voltage appears across each component. If the frequency is increased
Discussion:
16 comments Page 2 of 2.
Kaushal said:
1 decade ago
Vc=i.Xc & Vr=i.R.
Given that
As given in question Vc = Vr
So f is inversely proportional to Vc.
Vr>Vc.
Given that
As given in question Vc = Vr
So f is inversely proportional to Vc.
Vr>Vc.
Sam said:
1 decade ago
As we know fc=1/2pifc. So if frequency increases than vc will decrease.
AMARENDRA DASH said:
1 decade ago
From the ques Vr = Vc.
So IR = IXc.
Xc inver.proper to f,
As f increase Xc decrease resulting IXc decrease i.e Vc decrease.
Hence Vr > Vc. answer.
So IR = IXc.
Xc inver.proper to f,
As f increase Xc decrease resulting IXc decrease i.e Vc decrease.
Hence Vr > Vc. answer.
K.jeevitha said:
1 decade ago
vc = i.xc and vr = i.r.
vc = vr.
So vr >vc.
vc = vr.
So vr >vc.
Mike said:
1 decade ago
Plain English. Capacitors allow a change in voltage to pass through. If it's allowing a higher frequency to pass through then the voltage drop on the capacitor lowers.
Fazl hamad said:
1 decade ago
Dear fellows.
AS xc = 1/2 pi.f.c as f increases inversely xc decrease,
Also vc = i. xc as xc decreases so voltage across capacitor decreases.
Thus vr is greater than vc.
AS xc = 1/2 pi.f.c as f increases inversely xc decrease,
Also vc = i. xc as xc decreases so voltage across capacitor decreases.
Thus vr is greater than vc.
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