Question T5C13
From subelement T5 - T5C
What is the abbreviation for kilohertz?
Why is this correct?
The correct abbreviation for kilohertz is 'kHz' because it follows standard SI unit conventions: lowercase 'k' for the kilo prefix (representing 1,000) and uppercase 'Hz' for hertz (named after Heinrich Hertz). The other options violate these rules - 'KHZ' uses incorrect capitalization throughout, 'khz' makes everything lowercase when 'Hz' must be capitalized, and 'khZ' incorrectly capitalizes the 'Z' instead of the 'H'.
Memory tip
Remember that unit abbreviations honor the scientist's name with proper capitalization - hertz becomes 'Hz' with capital H, just like ampere becomes 'A' and volt becomes 'V'. Prefixes like kilo, mega, and giga follow their own capitalization rules regardless of the base unit.
Learn more
In amateur radio frequency coordination, proper abbreviation usage ensures clear communication in band plans and technical documentation. When discussing frequency privileges in Part 97, you'll see kHz used for frequency ranges like the 160-meter band (1800-2000 kHz) and MHz for VHF/UHF bands. Correct abbreviations prevent confusion in frequency coordination and interference reports to the FCC.
Think about it
Why do you think maintaining consistent capitalization rules for unit abbreviations is especially important when amateur radio operators communicate technical information across different countries and languages?