Question

Three waves A,B and C of frequencies 1600 kHz, 5 MHz and 60 MHz, respectively are to be transmitted from one place to another.Which of the following is the appropriate mode of communication?
A. A is transmitted via space wave while B and C transmitted via sky wave.
B. A is transmitted via ground wave while, B via sky wave and C via space wave.
C. B and C are transmitted via ground wave while A is transmiites via sky wave.
D. B is transmitted vis ground wave while A and C are transmitted via space wave.

Answer 1

Correct Answer - B
Range of frequencies is as follows:
Ground wave : `300 Hz"to" 300 kHz`
(it may go upto 3 MHz)
sky wave : `300 kHz "to" 3 MHz`
Space wave :`3 MHz "to" 300 GHz`.