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The power delivered to a three-phase load can be measured by the use of 2 wattmeter only when the A. Load is balanced B. 3 -phase load is connected to the source through 3 wires C. Load is unbalanced D. 3 -phase load is connected to the source through 4 wires

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The power delivered to a three-phase load can be measured by the use of 2 wattmeter only when the  Load is unbalanced

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