Sensor Resistance Responses to Environmental Changes

Steps:

• LDR resistance decreases as light intensity increases; the car moves from dark to bright, so LDR resistance decreases.
• Thermistor (NTC type) resistance decreases as temperature increases; the car moves from warm to cold, so temperature decreases and thermistor resistance increases.
• Combine changes: LDR decreases due to more light, thermistor increases due to less heat.

Why C is correct:

• LDR follows inverse light-resistance relation (higher illumination reduces resistance); NTC thermistor follows inverse temperature-resistance relation (lower temperature increases resistance).

Why the others are wrong:

• A: Thermistor resistance increases (not decreases) in colder conditions.
• B: LDR resistance decreases (not increases) in brighter conditions; thermistor increases (not decreases).
• D: Thermistor resistance increases (not decreases) in colder conditions.

Final answer: C