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Answer:
2 conductors.
Explanation:
A dimmer switch is an electrical switching or control device used to control the power or voltage to a compatible dimmer bulb.
It reduces the ambience if light bulbs by uniformly increasing the resistance of the switch when the knob is rotated to a lesser point. It is a circuit breaker as two conductors are connected to its terminals and a variable voltage resistor determines the flow of current between them.
It's more expensive, it's more difficult to configure and maintain and it can be more difficult to troubleshoot
