Propagation

Explanation of question 6

The frequency band 300- 3000MHz is known as

  1. high frequency (HF)
  2. very high frequency (VHF)
  3. ultra high frequency (UHF)
  4. super high frequency (SHF)

The answer is :- 3

The number to remember is ‘3’, and the steps ‘times 10’, i.e.

low frequency (l.f.) 30-300 kHz
medium frequency (m.f.) 300-3000 kHz> (0.3-3MHz)
high frequency (h.f.) 3-30 MHz
very high frequency (v.h.f.) 30-300 MHz
ultra high frequency (u.h.f.) 300-3000 MHz (O.3-3GHz)
super high frequency (s.h.f.) 3-30 GHz
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