Which statement correctly describes LDRs with increasing light?

Which statement correctly describes LDRs with increasing light?

• A. Their current decreases
• B. Their resistance decreases
• C. Their capacitance increases
• D. Their resistance increases

Answer: (B)

LDRs change their resistance based on light level: brighter light generates more charge carriers in the semiconductor, which makes it more conductive and lowers the resistance. So as light increases, the resistance decreases. In a circuit with a fixed voltage, that drop in resistance means more current flows, which aligns with the idea that current increases with more light. The other statements don’t fit the main behavior: current would not decrease as light increases; LDRs aren’t defined by a change in capacitance with light (capacitance isn’t the primary response); and resistance does not increase with increasing light.

LDRs change their resistance based on light level: brighter light generates more charge carriers in the semiconductor, which makes it more conductive and lowers the resistance. So as light increases, the resistance decreases. In a circuit with a fixed voltage, that drop in resistance means more current flows, which aligns with the idea that current increases with more light.

The other statements don’t fit the main behavior: current would not decrease as light increases; LDRs aren’t defined by a change in capacitance with light (capacitance isn’t the primary response); and resistance does not increase with increasing light.