Discussion :: Measurements and Instrumentation
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Assertion (A): A low power factor wattmeter has special constructional features to ensure accurate measurement.
Reason (R): Extension of wattmeter range in dc circuit can be easily done by using current and potential transformer.
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A.
Both A and R are true and R is correct explanation of A
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B.
Both A and R are true but R is not correct explanation of A
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C.
A is true R is false
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D.
A is false R is true
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Answer : Option C
Explanation :
CT and PT cannot be used in dc.
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