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An electro magnetic wave of frequency 5 GHz is travelling in a medium whose relative electric permittivity and relative magnetic permeability both are 2. Its velocity in this medium is________ $\times 10^{7} m / s$ .

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Detailed Solution

$\begin{array}{l} Refractive Index, n = \sqrt{μ_{r} ε_{r}} = \sqrt{2 \times 2} = 2 \\ Velocity in medium, v = \frac{C}{n} = \frac{3 \times 10^{8}}{2} = 15 \times 10^{7} m / s \\ \Rightarrow x = 15 \end{array}$

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