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Measurement of power factor of a 3-phase system by two-wattmeter method can be obtained in case of
- a)balanced source with 3-phase, 3-wire unbalanced load.
- b)balanced load and balanced source.
- c)balanced source with 3-phase, 3-wire unbalanced load.
- d)balanced source with 3-phase, 4-wire unbalanced load.
Correct answer is option 'B'. Can you explain this answer?
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Measurement of power factor of a 3-phase system by two-wattmeter metho...
Measurement of Power Factor of a 3-Phase System by Two-Wattmeter Method
The power factor of a 3-phase system can be measured using the two-wattmeter method. This method is commonly used in industrial and commercial applications to determine the power factor and balance of a 3-phase load. The two-wattmeter method is based on the principle of balanced loads, where the load in each phase is equal.
Option B: Balanced Load and Balanced Source
In this case, the correct answer is option B, which refers to a balanced load and balanced source. Let's understand why this option is correct and the other options are incorrect.
Option A: Balanced Source with 3-Phase, 3-Wire Unbalanced Load
In this scenario, the load in each phase is unbalanced. The two-wattmeter method relies on the assumption of balanced loads, where the load in each phase is equal. Therefore, this option is incorrect for measuring the power factor using the two-wattmeter method.
Option C: Balanced Source with 3-Phase, 3-Wire Unbalanced Load
Similar to option A, this option also involves an unbalanced load. As mentioned earlier, the two-wattmeter method can only be used for balanced loads. Hence, option C is not a suitable choice for measuring the power factor using the two-wattmeter method.
Option D: Balanced Source with 3-Phase, 4-Wire Unbalanced Load
This option includes a 3-phase, 4-wire unbalanced load. The two-wattmeter method is designed specifically for 3-phase, 3-wire systems. It cannot accurately measure the power factor in a 4-wire system. Therefore, option D is not the correct answer for the two-wattmeter method.
Conclusion
The correct answer to the question is option B, which involves a balanced load and balanced source. The two-wattmeter method is suitable for measuring the power factor in a 3-phase system when both the load and source are balanced. It cannot be used for unbalanced loads or 4-wire systems.
The power factor of a 3-phase system can be measured using the two-wattmeter method. This method is commonly used in industrial and commercial applications to determine the power factor and balance of a 3-phase load. The two-wattmeter method is based on the principle of balanced loads, where the load in each phase is equal.
Option B: Balanced Load and Balanced Source
In this case, the correct answer is option B, which refers to a balanced load and balanced source. Let's understand why this option is correct and the other options are incorrect.
Option A: Balanced Source with 3-Phase, 3-Wire Unbalanced Load
In this scenario, the load in each phase is unbalanced. The two-wattmeter method relies on the assumption of balanced loads, where the load in each phase is equal. Therefore, this option is incorrect for measuring the power factor using the two-wattmeter method.
Option C: Balanced Source with 3-Phase, 3-Wire Unbalanced Load
Similar to option A, this option also involves an unbalanced load. As mentioned earlier, the two-wattmeter method can only be used for balanced loads. Hence, option C is not a suitable choice for measuring the power factor using the two-wattmeter method.
Option D: Balanced Source with 3-Phase, 4-Wire Unbalanced Load
This option includes a 3-phase, 4-wire unbalanced load. The two-wattmeter method is designed specifically for 3-phase, 3-wire systems. It cannot accurately measure the power factor in a 4-wire system. Therefore, option D is not the correct answer for the two-wattmeter method.
Conclusion
The correct answer to the question is option B, which involves a balanced load and balanced source. The two-wattmeter method is suitable for measuring the power factor in a 3-phase system when both the load and source are balanced. It cannot be used for unbalanced loads or 4-wire systems.
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Measurement of power factor of a 3-phase system by two-wattmeter method can be obtained in case ofa)balanced source with 3-phase, 3-wire unbalanced load.b)balanced load and balanced source.c)balanced source with 3-phase, 3-wire unbalanced load.d)balanced source with 3-phase, 4-wireunbalanced load.Correct answer is option 'B'. Can you explain this answer?
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