The radio waves of frequency 30 MHz to 3...

The radio waves of frequency 30 MHz to 300 MHz belong to

High frequency band

Very high frequency band

Ultra high frequency band

Super high frequency band

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Give (brief) reasons for the following : (a) We use 'sky wave' mode of propagation of electromagnetic waves, only for frequencies upto 30 to 40 MHz. (b) The LOS communication, via space waves, has a (fairly) limited range. (c) A mobile phone user gets uninterrupted link to talk while walking.

RESONANCE ENGLISH-COMMUNICATION SYSTEMS-Exercise 2

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