Measurement and Instrumentation
A bridge circuit is shown in the figure below. Which one of the sentence given below is most suitable for balancing the bridge?

 First adjust R2 and then adjust R3.
 First adjust R2 and then adjust R4.
 First adjust R4 and then adjust R2.
 First adjust R4 and then adjust R1.

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Measurement and Instrumentation
Assertion(A): A low power factor wattmeter has special constructional features to ensure accurate measurment. Reason(R): Extension of wattmeter range in DC circuit can be easily done by using current and potential transformer

 A is false R is true.
 A is true R is false.
 Both A and R is true and R is not correct explanation of A.
 Both A and R is true and R is correct explanation of A C.

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