What happens to the resistance measured in ohms when the intensity of light sensed by the cad cell increases?

When the intensity of light sensed by the cad cell increases, the resistance measured in ohms decreases. A cad cell, or photoresistor, exhibits a property known as photoconductivity, meaning its electrical resistance changes in response to light. As the light intensity increases, the cad cell allows more current to flow, which results in a lower resistance. This relationship is integral to the operation of oil burners that rely on cad cells to monitor flame presence; the cad cell's changing resistance helps control the burner operation.

In contrast, if one were to consider what may happen if there was a lack of light, the resistance would increase, leading to a different functional outcome in the burner system.