In which of the following ways can zero drift be reduced in pH meters?(a) Using filter(b) Giving zero adjustment arrangement(c) Keeping the input impedance high(d) Using balanced and differential amplifiersThis question was posed to me in an interview for job.Enquiry is from pH Meters topic in portion pH Meters and Ion Analysers of Analytical Instrumentation

In which of the following ways can zero drift be reduced in pH meters?

1.	In which of the following ways can zero drift be reduced in pH meters?(a) Using filter(b) Giving zero adjustment arrangement(c) Keeping the input impedance high(d) Using balanced and differential amplifiersThis question was posed to me in an interview for job.Enquiry is from pH Meters topic in portion pH Meters and Ion Analysers of Analytical Instrumentation
Answer» Correct option is (d) Using balanced and differential AMPLIFIERS Explanation: Zero drift be reduced in PH meters using balanced and differential amplifiers. Their response to EXTERNAL signals are ADDITIVE and to internal noise are subtractive.

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