What is the electron density of the layer if critical frequency is 3 M – McqOptions

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1.	What is the electron density of the layer if critical frequency is 3 MHz?
A.	11 10<sup>12</sup>/cm<sup>3</sup>
B.	0.11 10<sup>12</sup>/cm<sup>3</sup>
C.	1.1 10<sup>12</sup>/cm<sup>3</sup>
D.	0.11 10<sup>10</sup>/cm<sup>3</sup>
Answer» C. 1.1 10<sup>12</sup>/cm<sup>3</sup>

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