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Maximum usable frequency (MUF) in F-regi...

Maximum usable frequency (MUF) in F-region layer is x, when the critical frequency is 60 MHz and the angle of incidence is `70^(@)`, then x is

A

150 MHz

B

170 MHz

C

175 MHz

D

190 MHz

Text Solution

Verified by Experts

The correct Answer is:
C
MUF `=f_c/(cos theta)=60/(cos 70^@) =175 ` MHz
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