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After detection, the resulting signal will have which of the following frequencies?

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After detection, the resulting signal will have which of the following frequencies?

(a) 1 kHz

(b) 10 kHz

(c) 100 kHz

(d) 1000 kHz

I had been asked this question in an online interview.

This question is from Instrumentation of ESR Spectrometer in portion Electron Spin Resonance Spectrometers of Analytical Instrumentation

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Best answer
Correct answer is (c) 100 kHz

For explanation I would say: After detection, the resulting signal will have 100 kHz. It contains ESR information.

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