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Measurements and Instrumentation

Q1: Measuring of unknown voltage with a dc potentiometer loses its advantage of open circuit measurement when

A primary circuit battery is changed

B standardisation is done to compensate for drift

C voltage is larger than range of potentiometer

D range reduction by factor of 10 is employed

ANS:D - range reduction by factor of 10 is employed

When volt ratio box is used to reduce range, the advantage of open-circuit measurement is lost.



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