An electromagnetic 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 ________× 107m/s.
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The correct answer is 15
\(n=\sqrt{\mu_r ε_r}=2\)
\(v={c\over n}\) =\(3×10^8\over 2\)
=15×107 m/s
Hence X=15 the answer
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