Match the following terms with their correct descriptions and select the correct answer using the codes given below the lists.

Question

Match the following terms with their correct descriptions and select the correct answer using the codes given below the lists.

List-X

i. VHF

ii. UHF

iii. HF

iv. SHF

List-Y

1. Commonly used for FM radio and TV channels

2. Used in cellular networks and TV broadcasting

3. Mainly used in amateur and shortwave radio

4. Often used in satellite communications

1. A. i-1, ii-3, iii-2, iv-4
2. B. i-3, ii-4, iii-1, iv-2
3. C. i-4, ii-3, iii-2, iv-1
4. D. i-1, ii-2, iii-3, iv-4 (Correct answer)

Correct Answer

Option D — i-1, ii-2, iii-3, iv-4

Detailed Solution & Explanation

The correct answer is i-1, ii-2, iii-3, iv-4.

Key Points

• VHF — 1: Very High Frequency, 30-300 MHz, commonly used for FM radio and television channels.
• UHF — 2: Ultra High Frequency, 300 MHz-3 GHz, used in cellular networks and TV broadcasting.
• HF — 3: High Frequency, 3-30 MHz, mainly used in amateur and shortwave radio.
• SHF — 4: Super High Frequency, 3-30 GHz, often used for satellite communications.
• The pairing therefore runs straight through as i-1, ii-2, iii-3, iv-4.

Additional Information

• The bands ascend in decade steps: VLF, LF, MF, HF, VHF, UHF, SHF, EHF, each spanning one decade of frequency.
• HF is the band that supports long-distance sky wave propagation via the ionosphere (see Q85), whereas VHF and above pass through the ionosphere and are limited to line of sight or satellite paths.