Electrical Engineering - RL Circuits - Discussion
Discussion Forum : RL Circuits - General Questions (Q.No. 16)
16.
Which of the following power factors results in less energy loss in an RL circuit?
Discussion:
17 comments Page 1 of 2.
Neeraj kumar said:
8 years ago
I agree with you @Madan C.
(1)
Manjunath said:
9 years ago
You are correct @Vijay & @Ravi.
Ajit kumar yadav said:
5 years ago
Power factor = true power/ apparent power.
Therefore power factor inversely proportional to apparent power.
Therefore to minimise apparent power which consists of reactive power that causes more loss, we have to decrease power factor.
Therefore power factor inversely proportional to apparent power.
Therefore to minimise apparent power which consists of reactive power that causes more loss, we have to decrease power factor.
NEERAJ KUMAR said:
5 years ago
Answer D is correct.
Because we know that energy loss means here works reactive Power [VI SIN (θ) ], and in sine function, if we increase the value of θ then the value will be increased, which means here we have to choose the minimum value of Power factor.
Because we know that energy loss means here works reactive Power [VI SIN (θ) ], and in sine function, if we increase the value of θ then the value will be increased, which means here we have to choose the minimum value of Power factor.
Ahsan said:
6 years ago
D is correct.
PF= R/Z.
Which means greater PF has greater has greater R consequently greater losses.
PF= R/Z.
Which means greater PF has greater has greater R consequently greater losses.
Gokul Bhardwaj said:
7 years ago
Answer D is correct.
If the power factor is very less it means there is a large value of inductance in the circuit. It causes an increase in reactance and a decrease in current. If current decreases then power loss is also decreased for constant resistance. However, the disadvantage of keeping the power factor low is that active power is decreased. Thus to do useful work active power must be increased and power factor must be enhanced.
If the power factor is very less it means there is a large value of inductance in the circuit. It causes an increase in reactance and a decrease in current. If current decreases then power loss is also decreased for constant resistance. However, the disadvantage of keeping the power factor low is that active power is decreased. Thus to do useful work active power must be increased and power factor must be enhanced.
Awais said:
7 years ago
P = VI*pf.
Power is directly proportional to power factor. Therefore for minimum power loss pf should be minimum.
Power is directly proportional to power factor. Therefore for minimum power loss pf should be minimum.
Deependra Kr said:
7 years ago
loss in RL crt= v^2/(R^2+wL^2)*R.
Loss=v^2/(R^2+wL^2)^1/2*cosθ.
=> loss proportional to pf.
So, the less value of pf is recommended.
Loss=v^2/(R^2+wL^2)^1/2*cosθ.
=> loss proportional to pf.
So, the less value of pf is recommended.
Munish said:
8 years ago
If pf is 1 means unity than their is less current flow in the circuit i.e. less energy consumed.
Nilesh said:
1 decade ago
At low power factor less current flow through circuit. Power loss = I^2 R.
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