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Sensitivity is the ratio of peak signal amplitude to which of the following?

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Sensitivity is the ratio of peak signal amplitude to which of the following?

(a) Time

(b) Rms noise

(c) Average noise

(d) Peak-to-peak noise

I had been asked this question by my school principal while I was bunking the class.

I need to ask this question from Sensivity Enhancement for NMR Spectroscopy topic in section Nuclear Magnetic Resonance Spectrometer of Analytical Instrumentation

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The correct answer is (b) Rms noise

To elaborate: Sensitivity is the ratio of peak signal amplitude to rms noise. It is a measure of the ability of an instrument to differentiate signal from surrounding noise.

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