Which is equal to 2425 MHz?
The correct answer is C: 2.425 GHz. 2425 MHz equals 2.425 GHz. To convert megahertz to gigahertz, divide by 1,000. The prefix 'mega-' means one million, and 'giga-' means one billion, so 1,000 MHz = 1 GHz.
2425 MHz ÷ 1,000 = 2.425 GHz. This is a standard frequency conversion. 2.425 GHz is in the microwave/SHF (Super High Frequency) range, commonly used for amateur radio satellite communications and other microwave applications. Understanding these conversions is essential for working with microwave frequencies.
Exam Tip
MHz to GHz = Divide by 1000. Remember: To convert megahertz to gigahertz, divide by 1,000. 2425 MHz ÷ 1000 = 2.425 GHz.
Memory Aid
"**M**Hz **T**o **G**Hz = **D**ivide **T**housand (think 'MTG = DTG' = Divide Thousand, ÷ 1000)"
Real-World Application
Amateur radio satellite communications often use frequencies around 2.425 GHz (2425 MHz). This is in the microwave range. Understanding that 2425 MHz = 2.425 GHz helps when working with microwave equipment specifications, as they might be labeled in either MHz or GHz.
FCC Part 97.303Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. 0.002425 GHz equals 2.425 MHz, not 2425 MHz. You divided by 1,000,000 instead of 1,000.
Option B: Incorrect. 24.25 GHz equals 24,250 MHz, not 2425 MHz. You're off by a factor of 10.
Option D: Incorrect. 2425 GHz is way too large. You didn't divide at all.
题目解析
The correct answer is C: 2.425 GHz. 2425 MHz equals 2.425 GHz. To convert megahertz to gigahertz, divide by 1,000. The prefix 'mega-' means one million, and 'giga-' means one billion, so 1,000 MHz = 1 GHz. 2425 MHz ÷ 1,000 = 2.425 GHz. This is a standard frequency conversion. 2.425 GHz is in the microwave/SHF (Super High Frequency) range, commonly used for amateur radio satellite communications and other microwave applications. Understanding these conversions is essential for working with microwave frequencies.
考试技巧
MHz to GHz = Divide by 1000. Remember: To convert megahertz to gigahertz, divide by 1,000. 2425 MHz ÷ 1000 = 2.425 GHz.
记忆口诀
**M**Hz **T**o **G**Hz = **D**ivide **T**housand (think 'MTG = DTG' = Divide Thousand, ÷ 1000)
实际应用示例
Amateur radio satellite communications often use frequencies around 2.425 GHz (2425 MHz). This is in the microwave range. Understanding that 2425 MHz = 2.425 GHz helps when working with microwave equipment specifications, as they might be labeled in either MHz or GHz.
错误选项分析
Option A: Incorrect. 0.002425 GHz equals 2.425 MHz, not 2425 MHz. You divided by 1,000,000 instead of 1,000. Option B: Incorrect. 24.25 GHz equals 24,250 MHz, not 2425 MHz. You're off by a factor of 10. Option D: Incorrect. 2425 GHz is way too large. You didn't divide at all.
知识点
Frequency conversion, Megahertz, Gigahertz, Microwave frequencies
Verified Content
Question from official FCC Technician Class question pool. Explanation reviewed by licensed amateur radio operators.