What portion of the AC cycle is converted to DC by a full-wave rectifier?
The correct answer is D: 360 degrees. The portion of the AC cycle converted to DC by a full-wave rectifier is 360 degrees. A full-wave rectifier conducts during both halves of the AC cycle, converting the entire cycle to DC. For amateur radio operators, this explains full-wave operation. Understanding this helps when analyzing rectifier circuits.
Exam Tip
Full-wave rectifier converts = 360 degrees of AC cycle. Think 'F'ull-'W'ave = 'F'ull cycle = '3'60 degrees. Full-wave rectifies both halves of AC cycle, converting entire cycle to DC. Not 90°, not 180° (half-wave), not 270° - just 360°.
Memory Aid
"Full-wave rectifier converts = 360 degrees of AC cycle. Think 'F'ull-'W'ave = 'F'ull cycle = '3'60 degrees. Full-wave rectifies both halves of AC cycle, converting entire cycle to DC. Uses both halves of AC power."
Real-World Application
A full-wave rectifier: During the positive half of the AC cycle (0-180°), one diode conducts. During the negative half (180-360°), another diode conducts. Full-wave converts 360 degrees of the AC cycle to DC, using both halves of the available power.
Key Concepts
Why Other Options Are Wrong
Option A (90 degrees): Incorrect. 90 degrees is one quarter cycle - full-wave rectifies the full cycle (360°), not one quarter. 90° is too small.
Option B (180 degrees): Incorrect. 180 degrees is one half cycle - full-wave rectifies the full cycle (360°), not one half. 180° is half-wave, not full-wave.
Option C (270 degrees): Incorrect. 270 degrees is three quarters - full-wave rectifies the full cycle (360°), not three quarters. 270° is too small.
题目解析
The correct answer is D: 360 degrees. The portion of the AC cycle converted to DC by a full-wave rectifier is 360 degrees. A full-wave rectifier conducts during both halves of the AC cycle, converting the entire cycle to DC. For amateur radio operators, this explains full-wave operation. Understanding this helps when analyzing rectifier circuits.
考试技巧
Full-wave rectifier converts = 360 degrees of AC cycle. Think 'F'ull-'W'ave = 'F'ull cycle = '3'60 degrees. Full-wave rectifies both halves of AC cycle, converting entire cycle to DC. Not 90°, not 180° (half-wave), not 270° - just 360°.
记忆口诀
Full-wave rectifier converts = 360 degrees of AC cycle. Think 'F'ull-'W'ave = 'F'ull cycle = '3'60 degrees. Full-wave rectifies both halves of AC cycle, converting entire cycle to DC. Uses both halves of AC power.
实际应用示例
A full-wave rectifier: During the positive half of the AC cycle (0-180°), one diode conducts. During the negative half (180-360°), another diode conducts. Full-wave converts 360 degrees of the AC cycle to DC, using both halves of the available power.
错误选项分析
Option A (90 degrees): Incorrect. 90 degrees is one quarter cycle - full-wave rectifies the full cycle (360°), not one quarter. 90° is too small. Option B (180 degrees): Incorrect. 180 degrees is one half cycle - full-wave rectifies the full cycle (360°), not one half. 180° is half-wave, not full-wave. Option C (270 degrees): Incorrect. 270 degrees is three quarters - full-wave rectifies the full cycle (360°), not three quarters. 270° is too small.
知识点
Full-wave rectifier, 360 degrees, AC cycle, Rectification
Verified Content
Question from official FCC General Class question pool. Explanation reviewed by licensed amateur radio operators.