Final answer:
Electronic switching devices can affect the resistance in split phase motors by causing a larger IR drop in the wires, reducing the voltage across the motor's coils. This can lead to a decrease in current and temporary dimming of lights in the same circuit.
Step-by-step explanation:
The resistance in split phase motors can be influenced by electronic switching devices. These devices have very low resistance when they are turned on, which permits a significant amount of current to flow. Due to the larger IR drop in the wires caused by the increased current, the voltage across the motor's coils is reduced, which in turn affects the motor's resistance. The motor may draw less current as a result, and the lights in the same circuit may briefly go dark.