Question

The magnitudes of spin magnetic moments of electron, proton and neutron are μ_e, μ_p and μ_n, respectively. Then

• A. μ_e>μ_p>μ_n
• B. μ_e=μ_p>μ_n
• C. μ_e<μ_p<μ_n
• D. μ_e<μ_p<μ_n

Answer 1

The Correct Option is A

The spin magnetic moments of elementary particles such as the electron, proton, and neutron are determined by their intrinsic properties, such as charge and mass. 

Key Observations:

1. The electron has a much larger spin magnetic moment than the proton or neutron due to its:
   • Smaller mass
   • Higher charge-to-mass ratio
2. The proton and neutron have comparable masses, but:
   • The neutron has no net charge, resulting in a much smaller magnetic moment.

Order of Magnetic Moments:

The correct order of magnetic moments is:

\[ \mu_e > \mu_p > \mu_n \]

Conclusion:

Thus, the correct answer is:

Option (A)