Correct unit of Bohr magneton isa)Tb)T/Jc)J/Td)JCorrect answer is opti...
The Bohr magneton μB is a physical constant and the natural unit for expressing the magnetic moment of an electron caused by either its orbital or spin angular momentum.
μB= eℏ/2me
where e is the elementary charge, ℏ is the reduced Planck's constant, me is the electron rest mass.
The value of Bohr magneton in SI units is 9.27400968(20)×10−24JT−1
View all questions of this testCorrect unit of Bohr magneton isa)Tb)T/Jc)J/Td)JCorrect answer is opti...
The Bohr magneton μB is a physical constant and the natural unit for expressing the magnetic moment of an electron caused by either its orbital or spin angular momentum.
μB= eℏ/2me
where e is the elementary charge, ℏ is the reduced Planck's constant, me is the electron rest mass.
The value of Bohr magneton in SI units is 9.27400968(20)×10−24JT−1
Correct unit of Bohr magneton isa)Tb)T/Jc)J/Td)JCorrect answer is opti...
Understanding the Bohr Magneton
The Bohr magneton is a physical constant that represents the magnetic moment of an electron due to its spin and orbital motion. It's crucial in quantum mechanics and solid-state physics.
Units of Bohr Magneton
- The Bohr magneton is denoted as "μB" and has a specific unit that can be derived from its definition.
- The formula for the magnetic moment (μ) is given in terms of energy (Joules) and magnetic field (Tesla).
Unit Analysis
- The unit of magnetic moment is defined as Joules per Tesla (J/T).
- This arises because the magnetic moment is the energy associated with a magnetic field.
Why J/T is Correct
- The relationship between magnetic moment and energy is essential:
- The energy (E) associated with a magnetic moment in a magnetic field (B) can be expressed as E = -μ · B.
- Rearranging gives us the magnetic moment as μ = E/B.
- Therefore, substituting the units, we have:
- Energy (E) in Joules (J) divided by magnetic field (B) in Tesla (T) gives us the unit J/T.
Conclusion
- The correct unit of the Bohr magneton is indeed J/T, confirming that the answer is option 'C'.
- This unit highlights the relationship between magnetic moments and the energy experienced in magnetic fields, which is fundamental in understanding magnetic properties in quantum mechanics.