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| Q. |
The power of a n-phase circuit can be measured by using a minimum of |
| A. | (n - 1) wattmeter elements |
| B. | n wattmeter elements |
| C. | (n + 1) wattmeter elements |
| D. | 2n wattmeter elements |
| Answer» A. (n - 1) wattmeter elements | |
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