How does an NMR spectrometer work?

Hint: NMR or Nuclear magnetic resonance spectroscopy is the study of molecules by recording the interaction of radio frequency electromagnetic radiations with the nuclei of molecules placed in a strong magnetic field.

Complete step by step answer:
It is a research technique that exploits the magnetic properties of certain atomic nuclei. The NMR spectroscopy determines the physical and chemical properties of atoms or molecules. It was observed firstly by Zeeman.
It mainly relies on nuclear magnetic resonance and provides detailed information about the structure, dynamics, reaction state and chemical environment of molecules.
NMR is a tool for organic chemists. The research in the organic lab has been significantly improved with the aid of the NMR.
NMR spectroscopy principle—
All nuclei are electrically charged and many have spin.
Transfer of energy is possible from base energy to higher energy levels when an external magnetic field is applied.
Transfer of energy occurs at a wavelength.
Energy is emitted at the same frequency when the spin comes back to its base level.
Therefore by measuring the signal which matches, this transfer the processing of NMR spectrum for the concerned nucleus is yielded.
NMR spectroscopy working—
The sample is placed in a magnetic field.
The nuclei sample is excited with nuclear magnetic resonance with the help of radio waves to produce NMR signal.
These signals are detected with sensitive radio receivers.
The resonance frequency of an atom in a molecule is changed by the intermolecular magnetic field surrounding it.
This gives the detail of functional groups and electronic configuration/structure of individual molecules.
It is a method to identify mononuclear organic compounds.
It also gives details of the reaction state, structure, chemical environment and dynamics of a molecule.

Note:
NMR spectroscopy Techniques
-Resonant frequency
-Acquisition of spectra
Application of NMR spectroscopy
-Used to investigate properties of organic molecules
-Used in studying physical properties at molecular level.