For sky wave propagation of a 10 MHz signal, what should be the minimu – McqOptions

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1.	For sky wave propagation of a 10 MHz signal, what should be the minimum electron density in ionosphere [AIIMS 2005]
A.	~ 1.2 ´ 1012 m?3
B.	~ 106 m?3
C.	~ 1014 m?3
D.	~ 1022 m?3
Answer» B. ~ 106 m?3

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