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Questions  >>  CBSE XII  >>  Physics  >>  Communication systems
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Q)

Calculate the phase velocity of electro magnetic wave having electron density and frequency for D layer , $N = 400\; electron /cc, \nu = 300\;kHz$

$\begin{array}{1 1} 80 \\ 8 \\ 0.80 \\ 0.08\end{array} $

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