What is the standard abbreviation for megahertz?

• A. Mhz
• B. GHz
• C. Hz
• D. MHz

Answer: (D)

The standard abbreviation for megahertz is "MHz," which stands for "megahertz." In this context, "mega" is a metric prefix meaning one million, so one megahertz equals one million hertz. The abbreviation is capitalized in line with the conventions for metric units, where prefixes like mega (M) are written in uppercase letters to denote large values.

The incorrect options relate to other frequency measurements or incorrect representations. For example, "Mhz" is not the correct capitalization; it does not adhere to standard notation. "GHz" stands for gigahertz, which is one billion hertz, and "Hz" stands for hertz, the basic unit of frequency. Understanding these terms helps clarify the hierarchies of frequency measurements used in radio communications and other fields.