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The dimensions of B² / (2μ0), where B is magnetic field and μ0 is the magnetic permeability of vacuum, is:
- MLT−2
- ML2T−1
- ML2T−2
- ML−1T−2
Correct answer: ML−1T−2
Solution
B^2/(2*mu0) is magnetic energy density, which has the dimensions of pressure: energy/volume = (ML^2T^-2)/(L^3) = ML^-1T^-2.
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