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 most appropriate mode of communication ______.

Options

• A is transmitted via space wave while B and C are transmitted via sky wave.

• A is transmitted via ground wave, B via sky wave and C via space wave.

• B and C are transmitted via ground wave while A is transmitted via sky wave.

• B is transmitted via ground wave while A and C are transmitted via space wave.

Answer 1

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 most appropriate mode of communication a is transmitted via ground wave, B via sky wave and C via space wave.

Explanation:

The radio waves emitted from a transmitter antenna can reach the receiver antenna by the following mode of operation.

• Ground wave propagation
• Sky wave propagation
• Space wave propagation

Mode of communication frequency range:

1. Ground wave propagation – 500 kHz to 1710 kHz
2. Sky wave propagation – 2 MHz to 40 MHz
3. Space wave propagation – 54 MHz to 42 GHz

So, A is transmitted via ground wave, B via sky wave and C via space wave.