 
             
            Electromagnetic Field Theory - Engineering
| Q1: Calculate the critical frequency for the E layer if maximum ionic densities are 3 x 106A 
15.58 x 106
  B 15.58 kHz
  C 
1.58 x 103
  D 
None of the above
  ANS:B - 15.58 kHz 
 
                                                    fc = 9Nmax       15.58 x 103 Hz. | 
 
             
                            
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