If $\varepsilon_0$ and $\varepsilon$ represent the permittivity of free space and absolute permittivity of a medium,then the relative permittivity of the medium is:
- A$\frac{\varepsilon^2}{\varepsilon_0}$
- B$\frac{\varepsilon_0}{\varepsilon}$
- C$\varepsilon \varepsilon_0$
- D$\frac{\varepsilon}{\varepsilon_0}$
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