Which of the following methods can be used to measure power in a single phase circuit without using wattmeter?
- One voltmeter, one ammeter
- Two voltmeters, two ammeter
- Three voltmeters
- Three ammeters
A. 1 and 2 only
B. 2 and 4 only
C. 1 and 3 only
D. 3 and 4 only
Show Answer
Answer: D
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