When N is the maximum electron density in per cubic metre. The critical frequency (fc) is given by

When N is the maximum electron density in per cubic metre. The critica

1.	When N is the maximum electron density in per cubic metre. The critical frequency (fc) is given by
A.	9 N
B.	9N
C.	9
Answer» D.

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When N is the maximum electron density in per cubic metre. The critical frequency (fc) is given by

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