Dimmer switch. This is the inside of the switch. The working components of a dimmer switch consist of a rheostat (variable resistor,lower left). Turning a circular knob increases the resistance in the rheostat,thereby lowering the amount of voltage available to the light and dimming it. This is a somewhat innefficient solution,since a lot of power is lost as heat energy from the resistor. More efficient modern systems rapidly switch the electrical supply on and off to effect the same result | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Andrew Lambert Photography |
Taille de l’image : | 4918 px × 3566 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |