How are impedances described in polar coordinates?
The correct answer is C: By magnitude and phase angle. How are impedances described in polar coordinates is by magnitude and phase angle. Polar coordinates use magnitude and angle. For amateur radio operators, this is important for circuit theory. Understanding this helps when working with impedance.
Exam Tip
Impedances in polar coordinates = by magnitude and phase angle. Think 'P'olar = 'P'hase angle and 'M'agnitude. Polar coordinates use magnitude and angle. Not X/R (rectangular), not real/imaginary (rectangular), not Y/G (admittance) - just magnitude and phase angle.
Memory Aid
"Impedances in polar coordinates = by magnitude and phase angle. Think 'P'olar = 'M'agnitude and 'P'hase. Polar coordinates use magnitude and angle. Important for circuit theory."
Real-World Application
Impedances described in polar coordinates: They're described by magnitude and phase angle. For example, 50∠30° means magnitude 50 ohms at 30° phase angle. This is how impedances are described in polar - magnitude and phase angle.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. By X and R values isn't polar - that's rectangular notation. X and R is rectangular.
Option B: Incorrect. By real and imaginary parts isn't polar - that's rectangular notation. Real/imaginary is rectangular.
Option D: Incorrect. By Y and G values isn't polar - that's admittance in rectangular. Y and G is admittance rectangular.
题目解析
The correct answer is C: By magnitude and phase angle. How are impedances described in polar coordinates is by magnitude and phase angle. Polar coordinates use magnitude and angle. For amateur radio operators, this is important for circuit theory. Understanding this helps when working with impedance.
考试技巧
Impedances in polar coordinates = by magnitude and phase angle. Think 'P'olar = 'P'hase angle and 'M'agnitude. Polar coordinates use magnitude and angle. Not X/R (rectangular), not real/imaginary (rectangular), not Y/G (admittance) - just magnitude and phase angle.
记忆口诀
Impedances in polar coordinates = by magnitude and phase angle. Think 'P'olar = 'M'agnitude and 'P'hase. Polar coordinates use magnitude and angle. Important for circuit theory.
实际应用示例
Impedances described in polar coordinates: They're described by magnitude and phase angle. For example, 50∠30° means magnitude 50 ohms at 30° phase angle. This is how impedances are described in polar - magnitude and phase angle.
错误选项分析
Option A: Incorrect. By X and R values isn't polar - that's rectangular notation. X and R is rectangular. Option B: Incorrect. By real and imaginary parts isn't polar - that's rectangular notation. Real/imaginary is rectangular. Option D: Incorrect. By Y and G values isn't polar - that's admittance in rectangular. Y and G is admittance rectangular.
知识点
Impedances, Polar coordinates, Magnitude and phase angle, Impedance notation
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.