Context: The gyromagnetic ratio γ is the constant of proportionality between the frequency ν of nuclear magnetic resonance (or electron paramagnetic resonance for electrons) and the applied magnetic field B: ν = γB. It is difficult to measure gyromagnetic ratios precisely because of the difficulties in precisely measuring B, but the value for protons in water at 7002298150000000000♠25 °C is known to better than one part per million. The protons are said to be "shielded" from the applied magnetic field by the electrons in the water molecule, the same effect that gives rise to chemical shift in NMR spectroscopy, and this is indicated by a prime on the symbol for the gyromagnetic ratio, γ′p. The gyromagnetic ratio is related to the shielded proton magnetic moment μ′p, the spin number I (I = 1⁄2 for protons) and the reduced Planck constant.

Question: The gyromagnetic ratio is the constant proportion between the magentic field and what?
Answer: the frequency ν of nuclear magnetic resonance

Question: How does the water molecule impact the effect of magnetic fields on protons?
Answer: The protons are said to be "shielded" from the applied magnetic field by the electrons in the water molecule

Question: What three factors impact the gyromagnetic ratio?
Answer: related to the shielded proton magnetic moment μ′p, the spin number I (I = 1⁄2 for protons) and the reduced Planck constant.

Question: The gyromagnetic ratio is often difficult to determine due to difficulty accurately determining the value of what?
Answer: the applied magnetic field B

Question: What ratio is the difference of proportionality between the frequency ν of nuclear magnetic resonance (or electron paramagnetic resonance for electrons) and the applied magnetic field?
Answer: Unanswerable

Question: What three factors impact the gyroelectric ratio?
Answer: Unanswerable

Question: What is never related to the shielded proton magnetic moment?
Answer: Unanswerable

Question: What effect is a the same effect that gives rise to chemical shift in KMR spectroscopy?
Answer: Unanswerable