Deep Dive: E6F02
The correct answer is A: Resistance decreases. What happens to photoconductive material when light shines on it is that resistance decreases. Light increases conductivity in photoconductive materials. For amateur radio operators, this is important for optoelectronics knowledge. Understanding this helps when working with photoconductive devices.
Why Other Answers Are Wrong
Option B: Incorrect. Resistance increases isn't correct - photoconductive materials decrease resistance when illuminated. Increase is wrong. Option C: Incorrect. Reflectivity increases isn't what happens - resistance decreases. Reflectivity isn't the effect. Option D: Incorrect. Reflectivity decreases isn't what happens - resistance decreases. Reflectivity isn't the effect.
Exam Tip
Photoconductive material with light = resistance decreases. Think 'P'hotoconductive = 'P'hotons 'C'onduct (resistance decreases). Light increases conductivity in photoconductive materials. Not increase, not reflectivity - just resistance decreases.
Memory Aid
Photoconductive material with light = resistance decreases. Think 'P'hotoconductive = 'D'ecreases resistance. Light increases conductivity in photoconductive materials. Important for optoelectronics knowledge.
Real-World Example
Photoconductive material when light shines on it: The resistance decreases. Light creates charge carriers, increasing conductivity and decreasing resistance. This is what happens - resistance decreases.
Source & Coverage
Question Pool: 2024-2028 Question Pool
Subelement: E6F
Reference: 2024-2028 Question Pool · E6 - Circuit Components
Key Concepts
Verified Content
Question from the official FCC Extra Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the E6F topic.