Measurements and Instrumentation

Q1: 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.

A Both A and R are true and R is correct explanation of A

B Both A and R are true but R is not correct explanation of A

C A is true R is false

D A is false R is true

ANS:C - A is true R is false

CT and PT cannot be used in dc.

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