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For sky wave propagation of a 18 MHz signal, what should be the minimum electron density in ionosphere ?A. `4xx10^(12)m^(-3)`B. `2xx10^(12)m^(-3)`C. `4xx10^(14)m^(-3)`D. `8xx10^(14)m^(-3)` |
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Answer» `v=9(N)^(1//2)` or `N=(v^(2))/(9^(2))=`((18xx10^(6))^(2))/(81)=4xx10^(12)m^(-3)` |
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