Electrical Engineering - RL Circuits - Discussion
Discussion Forum : RL Circuits - True or False (Q.No. 2)
2.
The resistor voltage in an RL circuit is always out of phase with the current.
Discussion:
20 comments Page 1 of 2.
Saurabh said:
1 decade ago
In resistance no doubt V & I is in phase but in case of RC circuit resultant current flow which is not in phase of voltage (lead) so due to this voltage across resistance is not in phase of current because R&C are in series and current in both are same.
KINJAL VYAS said:
9 years ago
VR along same axis or direction as that of current phasor i.e VR is in phase with I.
We know that in the inductor, voltage leads current by 90 degrees, so draw VL (voltage drop across inductor) perpendicular to current phasor.
We know that in the inductor, voltage leads current by 90 degrees, so draw VL (voltage drop across inductor) perpendicular to current phasor.
Suraj sharma said:
8 years ago
If it was the case of rlc circuit then at resonance condition xl = xc which makes the voltage go in phase with current, though the case is just of rl hence no possiblity that the voltage comes in phase with current.
Masti said:
1 decade ago
In any case:.
Current THROUGH RESISTOR is in phase with voltage ACROSS ""IT"".
Current THROUGH INDUCTOR LAGS the voltage ACROSS ""IT"".
Current THROUGH CAPACITOR LEADS the voltage ACROSS ""IT"".
Current THROUGH RESISTOR is in phase with voltage ACROSS ""IT"".
Current THROUGH INDUCTOR LAGS the voltage ACROSS ""IT"".
Current THROUGH CAPACITOR LEADS the voltage ACROSS ""IT"".
K.Prasad said:
1 decade ago
Read the question carefully. The question is given as resistor voltage is out of phase not the voltage of total rl circuit. Because in resistor the current is always in phase with voltage.
Sourav said:
1 decade ago
@k. Prasad--.
You are wrong. Resistor voltage not always phase with current. It's happen for ideal resistor which is practicaly impossible. It always lead current by some angle.
You are wrong. Resistor voltage not always phase with current. It's happen for ideal resistor which is practicaly impossible. It always lead current by some angle.
Neeraj said:
1 decade ago
If x=0 then how can you say that it is rl circuit. It will be only resistance circuit.
If you are saying that its rl circuit then obviously its have nonzero values of r and l.
If you are saying that its rl circuit then obviously its have nonzero values of r and l.
Sharmila said:
9 years ago
If it is only resistor then it is in phase. It is RL circuit so, it is out of phase. i.e. is current lags voltage by some angle depends on the inductor value.
(1)
Naresh said:
8 years ago
Here, the word ' always ' defines the question. It may or may not but in case of parallel the resistor voltage is not in out of phase of current.
Saurabh said:
1 decade ago
As it is mention here voltage across resistance is in phase only with real part of current but not resultant current. So it is a true statement.
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