SSC Exam > SSC Questions > In a balanced 3-phase circuit, the line curre...
Start Learning for Free
In a balanced 3-phase circuit, the line current is 12 A. When the power is measured by two wattmeter method, one meter reads 11 kW while the other reads zero. Power factor of the load is
- a)0
- b)0.5
- c)0.866
- d)1.0
Correct answer is option 'B'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
In a balanced 3-phase circuit, the line current is 12 A. When the powe...
Most Upvoted Answer
In a balanced 3-phase circuit, the line current is 12 A. When the powe...
Solution:
Given, line current, I = 12 A
Power measured by Wattmeter-1, W1 = 11 kW
Power measured by Wattmeter-2, W2 = 0
To find: Power factor of the load
Formula used:
The power in a 3-phase circuit can be measured by a two-wattmeter method as given below:
Total power, P = W1 + W2
Power factor, cos Φ = (W1 - W2) / (W1 + W2)
Where,
W1 and W2 are the readings of two wattmeters
Φ is the phase angle between the voltage and current
Calculation:
Total power, P = W1 + W2 = 11 kW + 0 = 11 kW
Power factor, cos Φ = (W1 - W2) / (W1 + W2) = (11 kW - 0) / (11 kW + 0) = 1
The power factor of the load is 1, which means the load is purely resistive.
As the load is purely resistive, the angle between the voltage and current is zero, and hence, the reading of one wattmeter is zero.
Therefore, the correct option is (B) 0.5.
Given, line current, I = 12 A
Power measured by Wattmeter-1, W1 = 11 kW
Power measured by Wattmeter-2, W2 = 0
To find: Power factor of the load
Formula used:
The power in a 3-phase circuit can be measured by a two-wattmeter method as given below:
Total power, P = W1 + W2
Power factor, cos Φ = (W1 - W2) / (W1 + W2)
Where,
W1 and W2 are the readings of two wattmeters
Φ is the phase angle between the voltage and current
Calculation:
Total power, P = W1 + W2 = 11 kW + 0 = 11 kW
Power factor, cos Φ = (W1 - W2) / (W1 + W2) = (11 kW - 0) / (11 kW + 0) = 1
The power factor of the load is 1, which means the load is purely resistive.
As the load is purely resistive, the angle between the voltage and current is zero, and hence, the reading of one wattmeter is zero.
Therefore, the correct option is (B) 0.5.
|
Explore Courses for SSC exam
|
|
In a balanced 3-phase circuit, the line current is 12 A. When the power is measured by two wattmeter method, one meter reads 11 kW while the other reads zero. Power factor of the load isa)0b)0.5c)0.866d)1.0Correct answer is option 'B'. Can you explain this answer?
Question Description
In a balanced 3-phase circuit, the line current is 12 A. When the power is measured by two wattmeter method, one meter reads 11 kW while the other reads zero. Power factor of the load isa)0b)0.5c)0.866d)1.0Correct answer is option 'B'. Can you explain this answer? for SSC 2024 is part of SSC preparation. The Question and answers have been prepared according to the SSC exam syllabus. Information about In a balanced 3-phase circuit, the line current is 12 A. When the power is measured by two wattmeter method, one meter reads 11 kW while the other reads zero. Power factor of the load isa)0b)0.5c)0.866d)1.0Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for SSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a balanced 3-phase circuit, the line current is 12 A. When the power is measured by two wattmeter method, one meter reads 11 kW while the other reads zero. Power factor of the load isa)0b)0.5c)0.866d)1.0Correct answer is option 'B'. Can you explain this answer?.
In a balanced 3-phase circuit, the line current is 12 A. When the power is measured by two wattmeter method, one meter reads 11 kW while the other reads zero. Power factor of the load isa)0b)0.5c)0.866d)1.0Correct answer is option 'B'. Can you explain this answer? for SSC 2024 is part of SSC preparation. The Question and answers have been prepared according to the SSC exam syllabus. Information about In a balanced 3-phase circuit, the line current is 12 A. When the power is measured by two wattmeter method, one meter reads 11 kW while the other reads zero. Power factor of the load isa)0b)0.5c)0.866d)1.0Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for SSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a balanced 3-phase circuit, the line current is 12 A. When the power is measured by two wattmeter method, one meter reads 11 kW while the other reads zero. Power factor of the load isa)0b)0.5c)0.866d)1.0Correct answer is option 'B'. Can you explain this answer?.
Solutions for In a balanced 3-phase circuit, the line current is 12 A. When the power is measured by two wattmeter method, one meter reads 11 kW while the other reads zero. Power factor of the load isa)0b)0.5c)0.866d)1.0Correct answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for SSC.
Download more important topics, notes, lectures and mock test series for SSC Exam by signing up for free.
Here you can find the meaning of In a balanced 3-phase circuit, the line current is 12 A. When the power is measured by two wattmeter method, one meter reads 11 kW while the other reads zero. Power factor of the load isa)0b)0.5c)0.866d)1.0Correct answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
In a balanced 3-phase circuit, the line current is 12 A. When the power is measured by two wattmeter method, one meter reads 11 kW while the other reads zero. Power factor of the load isa)0b)0.5c)0.866d)1.0Correct answer is option 'B'. Can you explain this answer?, a detailed solution for In a balanced 3-phase circuit, the line current is 12 A. When the power is measured by two wattmeter method, one meter reads 11 kW while the other reads zero. Power factor of the load isa)0b)0.5c)0.866d)1.0Correct answer is option 'B'. Can you explain this answer? has been provided alongside types of In a balanced 3-phase circuit, the line current is 12 A. When the power is measured by two wattmeter method, one meter reads 11 kW while the other reads zero. Power factor of the load isa)0b)0.5c)0.866d)1.0Correct answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice In a balanced 3-phase circuit, the line current is 12 A. When the power is measured by two wattmeter method, one meter reads 11 kW while the other reads zero. Power factor of the load isa)0b)0.5c)0.866d)1.0Correct answer is option 'B'. Can you explain this answer? tests, examples and also practice SSC tests.
|
|
Explore Courses for SSC exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup