Measurement and Instrumentation
If an inductance L is connected in one arm of bridge and resistance R1, R2, R3 in other three arms

 The bridge is balanced for some specified value of R1, R2, R3.
 The bridge can not be balanced.
 The bridge can be balanced.
 The bridge is balanced for some specified value of frequency.

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

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

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