In order to be able to minimize the effects of changes occurring in the electrode impedances, it is necessary to employ a preamplifier having a high input impedance.(a) True(b) FalseI had been asked this question in a job interview.I want to ask this question from Sources of Noise in Low Level Measurements topic in section Recording System of Biomedical Instrumentation

In order to be able to minimize the effects of changes occurring in th

1.	In order to be able to minimize the effects of changes occurring in the electrode impedances, it is necessary to employ a preamplifier having a high input impedance.(a) True(b) FalseI had been asked this question in a job interview.I want to ask this question from Sources of Noise in Low Level Measurements topic in section Recording System of Biomedical Instrumentation
Answer» Right option is (a) True The best I can EXPLAIN: True. In order to be able to minimize the effects of CHANGES occurring in the ELECTRODE IMPEDANCES, it is necessary to employ a preamplifier having a high input impedance. It has been found that a low value of input impedance gives rise to considerable distortion of the recordings.

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