Question T5B13
From subelement T5 - T5B
Which is equal to 2425 MHz?
Why is this correct?
2425 MHz equals 2.425 GHz because 1 GHz = 1,000 MHz. To convert MHz to GHz, divide by 1,000: 2425 ÷ 1,000 = 2.425 GHz. Choice A (0.002425) divides by 1,000,000 instead of 1,000. Choice B (24.25) multiplies by 10 instead of dividing. Choice D (2425) shows no conversion at all.
Memory tip
When converting between frequency units, always move the decimal point based on the metric prefix multiplier. Mega is 10⁶, giga is 10⁹, so MHz to GHz requires dividing by 1,000 (moving decimal left three places).
Learn more
Understanding frequency unit conversions is essential for amateur radio operation. The 2.4 GHz ISM band (including WiFi) spans 2400-2485 MHz, which explains why this question uses 2425 MHz as an example. When reading equipment specifications or setting up digital modes, you'll encounter frequencies expressed in both MHz and GHz. Higher frequency bands like 10 GHz and above require precise frequency coordination, making unit conversion accuracy critical for frequency privileges and avoiding interference with other services.
Think about it
Why do you think amateur radio equipment manuals sometimes express the same frequency in different units (MHz vs GHz) depending on the context?