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

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Measurement and Instrumentation
A DC potentiometer is the best means available for the measurement of DC voltage because

  It is based on null balance technique.
 None of above.
 The precision in measurment is independent of the type of the defector used.
 It is possible to standardize before a measurement is undertaken.

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