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The presence of dirt or moisture degrades which of the following?

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in Analytical Instrumentation by (131k points)
The presence of dirt or moisture degrades which of the following?

(a) Circuit components

(b) High input impedance of buffer amplifier

(c) Low input impedance of buffer amplifier

(d) Low output impedance of buffer amplifier

The question was posed to me in final exam.

The doubt is from Ion Analyser topic in section pH Meters and Ion Analysers of Analytical Instrumentation

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Right choice is (b) High input impedance of buffer amplifier

To explain I would say: The presence of dirt or moisture degrades the high input impedance of the buffer amplifier. Solder flux may also degrade it.

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