Human: What is the difference between a dimmer switch and a rheostat? Assistant: 
A dimmer switch is a device that allows you to adjust the brightness of your lights. It works by allowing you to turn up or down the amount of electricity flowing through the bulb, which in turn affects the brightness. A rheostat is a type of electrical component used to control the amount of current passing through an electrical circuit. It can be used to adjust the brightness of a light, but it does so by changing the resistance of the circuit rather than adjusting the amount of power flowing through it.