Electrical Engineering (EE) Exam > Electrical Engineering (EE) Questions > Measurement of power of a 3-phase balanced lo...
Start Learning for Free
Measurement of power of a 3-phase balanced load is done using the wattmeter method. If the ratio of the wattmeter readings is 2 : 1 then the power factor of the circuit will be:
- a)0.0
- b)1.0
- c)0.5
- d)0.866
Correct answer is option 'D'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Most Upvoted Answer
Measurement of power of a 3-phase balanced load is done using the watt...
Calculation of Power Factor:
1. **Given Data:**
- Ratio of Wattmeter readings = 2 : 1
2. **Formula:**
- Power factor (PF) = cos(θ) = P/S
3. **Explanation:**
- The ratio of the wattmeter readings is directly proportional to the active power (P) in a 3-phase balanced load circuit.
- Let's assume the wattmeter readings are 2W and W (2:1 ratio).
- The total power (S) in a 3-phase circuit is given by S = √3 * V * I, where V is the line voltage and I is the line current.
- Therefore, the power factor (PF) can be calculated as PF = (2W + W) / (√3 * V * I)
- Simplifying the expression, PF = 3W / (√3 * V * I) = 3 / (√3 * V * I / W)
- As per the given ratio, W = 1 and 2W = 2.
- Substituting the values, PF = 3 / (2 * √3 * V * I) = 0.866
4. **Conclusion:**
- The power factor of the circuit is 0.866 (approximately) when the ratio of wattmeter readings is 2 : 1.
1. **Given Data:**
- Ratio of Wattmeter readings = 2 : 1
2. **Formula:**
- Power factor (PF) = cos(θ) = P/S
3. **Explanation:**
- The ratio of the wattmeter readings is directly proportional to the active power (P) in a 3-phase balanced load circuit.
- Let's assume the wattmeter readings are 2W and W (2:1 ratio).
- The total power (S) in a 3-phase circuit is given by S = √3 * V * I, where V is the line voltage and I is the line current.
- Therefore, the power factor (PF) can be calculated as PF = (2W + W) / (√3 * V * I)
- Simplifying the expression, PF = 3W / (√3 * V * I) = 3 / (√3 * V * I / W)
- As per the given ratio, W = 1 and 2W = 2.
- Substituting the values, PF = 3 / (2 * √3 * V * I) = 0.866
4. **Conclusion:**
- The power factor of the circuit is 0.866 (approximately) when the ratio of wattmeter readings is 2 : 1.
Free Test
FREE
| Start Free Test |
Community Answer
Measurement of power of a 3-phase balanced load is done using the watt...
Concept:
In a two-wattmeter method,
The reading of first wattmeter (W1) = VL IL cos (30 – ϕ)
The reading of second wattmeter (W2) = VL IL cos (30 + ϕ)
Total power in the circuit (P) = W1 + W2
Total reactive power in the circuit Q = √3(W1−W2)
Power factor = cos ϕ
Calculation:
Given that, W1 / W2 = 2 : 1
ϕ = 30°
ϕ = 30°
cosϕ = 0.866
Important Points
Attention Electrical Engineering (EE) Students!
To make sure you are not studying endlessly, EduRev has designed Electrical Engineering (EE) study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Electrical Engineering (EE).
|
Explore Courses for Electrical Engineering (EE) exam
|
|
Similar Electrical Engineering (EE) Doubts
Top Courses for Electrical Engineering (EE)View all
Measurement of power of a 3-phase balanced load is done using the wattmeter method. If the ratio of the wattmeter readings is 2 : 1 then the power factor of the circuit will be:a)0.0b)1.0c)0.5d)0.866Correct answer is option 'D'. Can you explain this answer?
Question Description
Measurement of power of a 3-phase balanced load is done using the wattmeter method. If the ratio of the wattmeter readings is 2 : 1 then the power factor of the circuit will be:a)0.0b)1.0c)0.5d)0.866Correct answer is option 'D'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about Measurement of power of a 3-phase balanced load is done using the wattmeter method. If the ratio of the wattmeter readings is 2 : 1 then the power factor of the circuit will be:a)0.0b)1.0c)0.5d)0.866Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Measurement of power of a 3-phase balanced load is done using the wattmeter method. If the ratio of the wattmeter readings is 2 : 1 then the power factor of the circuit will be:a)0.0b)1.0c)0.5d)0.866Correct answer is option 'D'. Can you explain this answer?.
Measurement of power of a 3-phase balanced load is done using the wattmeter method. If the ratio of the wattmeter readings is 2 : 1 then the power factor of the circuit will be:a)0.0b)1.0c)0.5d)0.866Correct answer is option 'D'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about Measurement of power of a 3-phase balanced load is done using the wattmeter method. If the ratio of the wattmeter readings is 2 : 1 then the power factor of the circuit will be:a)0.0b)1.0c)0.5d)0.866Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Measurement of power of a 3-phase balanced load is done using the wattmeter method. If the ratio of the wattmeter readings is 2 : 1 then the power factor of the circuit will be:a)0.0b)1.0c)0.5d)0.866Correct answer is option 'D'. Can you explain this answer?.
Solutions for Measurement of power of a 3-phase balanced load is done using the wattmeter method. If the ratio of the wattmeter readings is 2 : 1 then the power factor of the circuit will be:a)0.0b)1.0c)0.5d)0.866Correct answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Electrical Engineering (EE).
Download more important topics, notes, lectures and mock test series for Electrical Engineering (EE) Exam by signing up for free.
Here you can find the meaning of Measurement of power of a 3-phase balanced load is done using the wattmeter method. If the ratio of the wattmeter readings is 2 : 1 then the power factor of the circuit will be:a)0.0b)1.0c)0.5d)0.866Correct answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Measurement of power of a 3-phase balanced load is done using the wattmeter method. If the ratio of the wattmeter readings is 2 : 1 then the power factor of the circuit will be:a)0.0b)1.0c)0.5d)0.866Correct answer is option 'D'. Can you explain this answer?, a detailed solution for Measurement of power of a 3-phase balanced load is done using the wattmeter method. If the ratio of the wattmeter readings is 2 : 1 then the power factor of the circuit will be:a)0.0b)1.0c)0.5d)0.866Correct answer is option 'D'. Can you explain this answer? has been provided alongside types of Measurement of power of a 3-phase balanced load is done using the wattmeter method. If the ratio of the wattmeter readings is 2 : 1 then the power factor of the circuit will be:a)0.0b)1.0c)0.5d)0.866Correct answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Measurement of power of a 3-phase balanced load is done using the wattmeter method. If the ratio of the wattmeter readings is 2 : 1 then the power factor of the circuit will be:a)0.0b)1.0c)0.5d)0.866Correct answer is option 'D'. Can you explain this answer? tests, examples and also practice Electrical Engineering (EE) tests.
|
|
Explore Courses for Electrical Engineering (EE) exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup