In terms of resistance $R$ and time $T$,the dimensions of the ratio $\frac{\mu}{\varepsilon}$ of the permeability $\mu$ and permittivity $\varepsilon$ is:

  • A
    $[R T^{-2}]$
  • B
    $[R^2 T^{-1}]$
  • C
    $[R^2]$
  • D
    $[R^2 T^2]$

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