Amateur Technician License Practice Test

The correct abbreviation for kilohertz is "kHz." This notation follows the standard conventions of using a lowercase 'k' to represent 'kilo,' which denotes a factor of one thousand, and an uppercase 'H' for 'Hertz,' the unit of frequency. In this case, the capital letter 'H' signifies that Hertz is derived from a person's name, Heinrich Hertz, who made significant contributions to the field of electromagnetism. Using "kHz" with a lowercase 'k' and an uppercase 'H' maintains the conventional formatting that helps differentiate the unit clearly and ensures that it adheres to established scientific writing standards. Other variations like "KHZ," "khz," and "khZ" do not follow this standard and could lead to confusion when conveying measurements in professional and technical contexts. Therefore, "kHz" is not only the correct choice but also the widely accepted form used in scientific literature and technical discussions.