A photoresistor is an electronic component whose electrical resistance _______ when it is exposed to light.

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Multiple Choice

A photoresistor is an electronic component whose electrical resistance _______ when it is exposed to light.

A photoresistor changes its resistance with light. When exposed to more light, it becomes more conductive and its resistance drops; in darkness, the resistance is very high. This variability is why the correct answer is that its resistance changes. The other options imply a fixed direction or no change, which isn’t accurate for a photoresistor, since the resistance depends on how much light is present. In practical terms, you’d use this changing resistance in a circuit (for example, a voltage divider) to sense ambient light levels for applications like automatic lighting or environmental monitoring.

A photoresistor changes its resistance with light. When exposed to more light, it becomes more conductive and its resistance drops; in darkness, the resistance is very high. This variability is why the correct answer is that its resistance changes. The other options imply a fixed direction or no change, which isn’t accurate for a photoresistor, since the resistance depends on how much light is present. In practical terms, you’d use this changing resistance in a circuit (for example, a voltage divider) to sense ambient light levels for applications like automatic lighting or environmental monitoring.

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