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In two wattmeter method, if power factor is 0.5, then one of the wattmeters will read
- a)zero
- b)w/2
- c)w/2
- d)w/3
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
In two wattmeter method, if power factor is 0.5, then one of the wattm...
Explanation:
Two wattmeter method is used to measure the power in a 3-phase system. The power in a 3-phase system can be measured using two wattmeters, each connected to any two phases of the system. The power measured by each wattmeter is the product of the voltage, current, and power factor of the respective phases.
When the power factor of the system is 0.5, it means that the load is highly inductive. In this case, the current lags behind the voltage, and the power factor is less than unity. The two wattmeter method is not accurate in measuring power in such cases. The reason is that the two wattmeters measure the power of the individual phases, and the power factor of each phase is different.
If the power factor of the system is 0.5, then one of the wattmeters will read zero. This is because the power factor of one of the phases is zero. The power factor of the other phase is 1, and the wattmeter connected to that phase will read the total power of the system.
Therefore, in the two wattmeter method, if the power factor of the system is 0.5, one of the wattmeters will read zero. The other wattmeter will read the total power of the system.
Conclusion:
In summary, in a highly inductive system with a power factor of 0.5, one of the wattmeters in the two wattmeter method will read zero. This is because the power factor of one of the phases is zero. The other wattmeter will read the total power of the system.
Two wattmeter method is used to measure the power in a 3-phase system. The power in a 3-phase system can be measured using two wattmeters, each connected to any two phases of the system. The power measured by each wattmeter is the product of the voltage, current, and power factor of the respective phases.
When the power factor of the system is 0.5, it means that the load is highly inductive. In this case, the current lags behind the voltage, and the power factor is less than unity. The two wattmeter method is not accurate in measuring power in such cases. The reason is that the two wattmeters measure the power of the individual phases, and the power factor of each phase is different.
If the power factor of the system is 0.5, then one of the wattmeters will read zero. This is because the power factor of one of the phases is zero. The power factor of the other phase is 1, and the wattmeter connected to that phase will read the total power of the system.
Therefore, in the two wattmeter method, if the power factor of the system is 0.5, one of the wattmeters will read zero. The other wattmeter will read the total power of the system.
Conclusion:
In summary, in a highly inductive system with a power factor of 0.5, one of the wattmeters in the two wattmeter method will read zero. This is because the power factor of one of the phases is zero. The other wattmeter will read the total power of the system.
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B,c
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In two wattmeter method, if power factor is 0.5, then one of the wattmeters will reada)zerob)w/2c)w/2d)w/3Correct answer is option 'A'. Can you explain this answer?
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