A) \[\text{v}=\frac{1}{\sqrt{{{\mu }_{r}}K}}\]
B) \[\text{v}=c\sqrt{{{\mu }_{r}}K}\]
C) \[\text{v}=\frac{c}{\sqrt{{{\mu }_{r}}K}}\]
D) \[\text{v}=\frac{K}{\sqrt{{{\mu }_{r}}C}}\]
Correct Answer: C
Solution :
Speed of light of vacuum \[c=\frac{1}{\sqrt{{{\mu }_{0}}{{\varepsilon }_{0}}}}\] and in another medium \[v=\frac{1}{\sqrt{\mu \varepsilon }}\]
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