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What is E in given equation?

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in Biomedical Instrumentation by (76.6k points)
What is E in given equation?

(a) induced emf

(b) Faradays Constant

(c) pH value deviation from 7

(d) standard potential

The question was posed to me by my school teacher while I was bunking the class.

This is a very interesting question from Spirometry in section Pulmonary Function Analysers of Biomedical Instrumentation

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The correct answer is (a) induced emf

Explanation: The potential (E) of the glass electrode may be written by means of the Nernst

equation:

where, Eo = standard potential R = gas constant T = absolute temperature F = Faraday constant DpH = pH value deviation from 7. The above relation shows that the emf developed in the electro-chemical pH cell is a linear function of DpH.

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