Final answer:
Ideal spark plug wire resistance is typically around 10,000 ohms per foot, which is crucial for proper engine performance and ignition.
Step-by-step explanation:
When checking the resistance of spark plug wires, the ideal resistance should commonly be about 10,000 ohms per foot. This value can vary depending on the type of spark plug wire and the manufacturer's specifications. Spark plug wires with too high or too low resistance can lead to poor engine performance or ignition problems.
As we've seen, resistance is related to the shape of an object and the material of which it is composed, which in this case is typically a wire with a carbon core designed to control electromagnetic interference.