A) \[M{{L}^{1}}\text{ }{{T}^{\,2}}\]
B) \[M{{L}^{2}}\text{ }{{T}^{\,\,2}}\]
C) \[M{{L}^{2}}\text{ }{{T}^{\,\,1}}\]
D) \[ML{{T}^{\,2}}\]
Correct Answer: A
Solution :
[a] The quantity \[\frac{{{B}^{2}}}{2{{\mu }_{0}}}\] is the energy density of magnetic field. \[\Rightarrow \,\,\,\left[ \frac{{{B}^{2}}}{2\,{{\mu }_{0}}} \right]=\left[ \frac{M{{L}^{2}}{{T}^{-2}}}{{{L}^{3}}} \right]\,=M{{L}^{-1}}{{T}^{-2}}\]
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