What does the value of Bz (B sub z) represent?
The correct answer is C: North-south strength of the interplanetary magnetic field. What does the value of Bz (B sub z) represent is north-south strength of the interplanetary magnetic field. Bz is the north-south component of the interplanetary magnetic field. For amateur radio operators, this is important for understanding space weather. Understanding this helps when evaluating propagation conditions.
Exam Tip
Bz represents = north-south strength of interplanetary magnetic field. Think 'B'z = 'B'etween 'Z'ones (north-south). Bz is the north-south component of the interplanetary magnetic field. Not stability, not critical frequency, not echo duration - just north-south strength.
Memory Aid
"Bz represents = north-south strength of interplanetary magnetic field. Think 'B'z = 'N'orth-'S'outh. Bz is the north-south component of the interplanetary magnetic field. Important for understanding space weather."
Real-World Application
Bz (B sub z): It represents the north-south strength of the interplanetary magnetic field. Bz is a component of the solar wind's magnetic field. When Bz is southward, it can interact with Earth's magnetic field and cause geomagnetic disturbances. This is what Bz represents - north-south strength of interplanetary magnetic field.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Geomagnetic field stability isn't what Bz represents - Bz is north-south strength of interplanetary field. Stability isn't Bz.
Option B: Incorrect. Critical frequency for vertical transmissions isn't what Bz represents - Bz is north-south strength of interplanetary field. Critical frequency isn't Bz.
Option D: Incorrect. Duration of long-delayed echoes isn't what Bz represents - Bz is north-south strength of interplanetary field. Echo duration isn't Bz.
题目解析
The correct answer is C: North-south strength of the interplanetary magnetic field. What does the value of Bz (B sub z) represent is north-south strength of the interplanetary magnetic field. Bz is the north-south component of the interplanetary magnetic field. For amateur radio operators, this is important for understanding space weather. Understanding this helps when evaluating propagation conditions.
考试技巧
Bz represents = north-south strength of interplanetary magnetic field. Think 'B'z = 'B'etween 'Z'ones (north-south). Bz is the north-south component of the interplanetary magnetic field. Not stability, not critical frequency, not echo duration - just north-south strength.
记忆口诀
Bz represents = north-south strength of interplanetary magnetic field. Think 'B'z = 'N'orth-'S'outh. Bz is the north-south component of the interplanetary magnetic field. Important for understanding space weather.
实际应用示例
Bz (B sub z): It represents the north-south strength of the interplanetary magnetic field. Bz is a component of the solar wind's magnetic field. When Bz is southward, it can interact with Earth's magnetic field and cause geomagnetic disturbances. This is what Bz represents - north-south strength of interplanetary magnetic field.
错误选项分析
Option A: Incorrect. Geomagnetic field stability isn't what Bz represents - Bz is north-south strength of interplanetary field. Stability isn't Bz. Option B: Incorrect. Critical frequency for vertical transmissions isn't what Bz represents - Bz is north-south strength of interplanetary field. Critical frequency isn't Bz. Option D: Incorrect. Duration of long-delayed echoes isn't what Bz represents - Bz is north-south strength of interplanetary field. Echo duration isn't Bz.
知识点
Bz, B sub z, North-south strength, Interplanetary magnetic field
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.