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The relation between the maximum electron density N max and the critical frequency f for the ionosphere can be given as 

(A) fc = √(9Nmax

(B) fc = √9(Nmax

(C) fc = 9√(Nmax

(D) None of these

1 Answer

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Best answer

The correct option is (C) fc = 9√(Nmax).

Explanation:

 fc = 9√(Nmax).

 where fc is critical frequency and Nmax is maximum electron density.

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