Final answer:
If your car's headlights suddenly go out, switch on the emergency flashers or hazard lights. Dimming lights in a vehicle are generally due to voltage drops in the electrical system caused by resistance or a depleting battery. While superconductors in the wiring would minimize dimming, the car battery's internal resistance can still cause some dimming.
Step-by-step explanation:
If the headlights on your car suddenly go out, you should first try turning on your emergency flashers or hazard lights. If the headlights dim or go out, it might be due to a problem with the car's electrical system, such as the battery's internal resistance increasing or the battery output voltage decreasing as the battery gets depleted. When you see lights dimming, like when the motor in a refrigerator comes on, it's because of a momentary drop in voltage. Similarly, in a car, the passenger compartment light dim when you start the engine because the starter motor requires a significant amount of current, which can momentarily reduce the voltage supplied to other electrical components in the car.
Regarding the question about whether your headlights would dim if the wires in your automobile were superconductors, the answer is it's unlikely because superconductors have no electrical resistance. However, you should not neglect the battery's internal resistance, which could still cause some dimming, although it would be significantly less than in a typical car with normal conductive wires.