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

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Measurement and Instrumentation
In AC circuits, the connection of measuring instruments cause loading effect errors which may effect

 magnitude, phase and waveform of the quantity being measured.
 only phase of the quantity being measured.
 both of above.
 only the magnitude of the quantity being measured.

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