Question

Which of the following removes residual harmonics from the phase-detected signal?

(a) High-pass filter

(b) Low-pass filter

(c) Band-pass filter

(d) Chopper

I got this question by my school principal while I was bunking the class.

I need to ask this question from Instrumentation of ESR Spectrometer topic in section Electron Spin Resonance Spectrometers of Analytical Instrumentation

Answer 1

Right answer is (b) Low-pass filter

To explain I would say: Low-pass filter removes residual harmonics from the phase-detected signal. It removes the residual 100 kHz if any.