A) \[\sqrt{{{\mu }_{o}}{{\varepsilon }_{o}}}\]
B) \[\sqrt{\frac{{{\mu }_{o}}}{{{\varepsilon }_{o}}}}\]
C) \[\sqrt{\frac{{{\varepsilon }_{o}}}{{{\mu }_{o}}}}\]
D) \[\frac{1}{\sqrt{{{\mu }_{o}}{{\varepsilon }_{o}}}}\]
Correct Answer: D
Solution :
\[{{\mu }_{0}}=4\pi \times {{10}^{-7}},\,{{\varepsilon }_{0}}=8.85\times {{10}^{-12}}\frac{N\text{-}{{m}^{2}}}{{{C}^{2}}}\] so \[c=\frac{1}{\sqrt{{{\mu }_{0}}{{\varepsilon }_{0}}}}=3\times {{10}^{8}}\frac{meter}{sec}.\]
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