Final answer:
The action that should not be taken when headlights are not working is driving with your high beams on, as it can be unsafe and illegal. If car wires were superconductors, headlights would not dim due to zero electrical resistance, disregarding the battery's internal resistance. DC-powered car headlights do not flicker like AC lights, providing constant illumination.
Step-by-step explanation:
The action which should NOT be taken if headlights are not working properly is driving with your high beams on. When you're experiencing headlight issues, it's important to first check the bulbs and replace them if necessary. Secondly, checking the fuses and replacing them if they're blown can restore headlight function. Additionally, cleaning the headlights with a soft cloth can improve visibility by removing dirt and grime. However, using high beams when your headlights are not working properly can be dangerous and is typically against traffic laws as it can dazzle other drivers, leading to unsafe driving conditions.
If your car's wires were composed of superconductors, the headlights would not dim when starting the car's engine, assuming the battery is in good condition. The reason is that superconductors have zero electrical resistance and therefore would not cause a voltage drop like regular wires do when the current increases. Nonetheless, it's important to consider the battery's internal resistance, as that could still cause some dimming.
The TAKE-HOME EXPERIMENT regarding AC/DC lights suggests waving your hand back and forth between your face and a fluorescent light bulb. Unlike AC-powered household lights that may exhibit a flicker when you wave your hand in front of them, a car's headlights, which are DC-powered, should not display a noticeable flicker. This is because DC-powered lights provide a constant light source without the fluctuations caused by alternating current (AC).