Which of the following is not preferred for electrode making?(a) Ag-AgCl(b) Copper(c) Stainless-steel(d) GoldI got this question in an interview for internship.Origin of the question is Recording Electrodes in portion Bioelectric Signal and Electrodes of Biomedical Instrumentation

Which of the following is not preferred for electrode making?(a) Ag-Ag

1.	Which of the following is not preferred for electrode making?(a) Ag-AgCl(b) Copper(c) Stainless-steel(d) GoldI got this question in an interview for internship.Origin of the question is Recording Electrodes in portion Bioelectric Signal and Electrodes of Biomedical Instrumentation
Answer» Right answer is (c) Stainless-steel Easy explanation: Stainless steel in CONTACT with a saline electrolyte produce a POTENTIAL difference of 10 mV between the electrodes which is much more than the limit (i.e 2.5 mV). Ad-AgCl electrodes give ALMOST noise free characteristics. They are also found to be acceptable from the POINT of view of long TERM drift.

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Which of the following is not preferred for electrode making?(a) Ag-AgCl(b) Copper(c) Stainless-steel(d) GoldI got this question in an interview for internship.Origin of the question is Recording Electrodes in portion Bioelectric Signal and Electrodes of Biomedical Instrumentation

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