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

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Measurement and Instrumentation
It can be stated that

CT operates at almost the same flux density as a PT
CT operates with considerably lower flux density than a PT
No generalisation can be made with regard to the flux densities in CT and PT
CT operates with a higher flux density than PT

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