What is the approximate open-circuit voltage from a fully illuminated silicon photovoltaic cell?
The correct answer is B: 0.5 VDC. The approximate open-circuit voltage from a fully illuminated silicon photovoltaic cell is 0.5 VDC. Silicon solar cells produce about 0.5 volts per cell under full illumination. For amateur radio operators, this helps when designing solar power systems. Understanding this helps when calculating panel voltages.
Exam Tip
Silicon photovoltaic cell voltage = 0.5 VDC. Think 'S'ilicon 'C'ell = 'S'ingle cell = '0'.5 volts. Silicon solar cells produce approximately 0.5 volts per cell under full illumination. Not 0.02, 0.2, or 1.38 volts - just 0.5 volts per cell.
Memory Aid
"Silicon photovoltaic cell voltage = 0.5 VDC. Think 'S'ilicon 'C'ell = 'S'ingle cell = '0'.5 volts. Silicon solar cells produce approximately 0.5 volts per cell under full illumination. Standard cell voltage."
Real-World Application
A single silicon solar cell under full sunlight produces about 0.5 volts open-circuit. A solar panel with 36 cells in series produces about 18 volts (36 × 0.5V). This 0.5 volts per cell is the standard for silicon photovoltaic cells.
Key Concepts
Why Other Options Are Wrong
Option A (0.02 VDC): Incorrect. 0.02 volts is way too low - silicon cells produce about 0.5 volts, not 0.02 volts. 0.02V would be unusable.
Option C (0.2 VDC): Incorrect. 0.2 volts is too low - silicon cells produce about 0.5 volts, not 0.2 volts. 0.2V is below typical cell voltage.
Option D (1.38 VDC): Incorrect. 1.38 volts is too high - silicon cells produce about 0.5 volts, not 1.38 volts. 1.38V would be multiple cells.
题目解析
The correct answer is B: 0.5 VDC. The approximate open-circuit voltage from a fully illuminated silicon photovoltaic cell is 0.5 VDC. Silicon solar cells produce about 0.5 volts per cell under full illumination. For amateur radio operators, this helps when designing solar power systems. Understanding this helps when calculating panel voltages.
考试技巧
Silicon photovoltaic cell voltage = 0.5 VDC. Think 'S'ilicon 'C'ell = 'S'ingle cell = '0'.5 volts. Silicon solar cells produce approximately 0.5 volts per cell under full illumination. Not 0.02, 0.2, or 1.38 volts - just 0.5 volts per cell.
记忆口诀
Silicon photovoltaic cell voltage = 0.5 VDC. Think 'S'ilicon 'C'ell = 'S'ingle cell = '0'.5 volts. Silicon solar cells produce approximately 0.5 volts per cell under full illumination. Standard cell voltage.
实际应用示例
A single silicon solar cell under full sunlight produces about 0.5 volts open-circuit. A solar panel with 36 cells in series produces about 18 volts (36 × 0.5V). This 0.5 volts per cell is the standard for silicon photovoltaic cells.
错误选项分析
Option A (0.02 VDC): Incorrect. 0.02 volts is way too low - silicon cells produce about 0.5 volts, not 0.02 volts. 0.02V would be unusable. Option C (0.2 VDC): Incorrect. 0.2 volts is too low - silicon cells produce about 0.5 volts, not 0.2 volts. 0.2V is below typical cell voltage. Option D (1.38 VDC): Incorrect. 1.38 volts is too high - silicon cells produce about 0.5 volts, not 1.38 volts. 1.38V would be multiple cells.
知识点
Photovoltaic cell, Open-circuit voltage, 0.5 VDC, Solar cell
Verified Content
Question from official FCC General Class question pool. Explanation reviewed by licensed amateur radio operators.