Power - Note-A-Rific: Power In everyday electrical devices...

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Note-A-Rific: Power In everyday electrical devices like heaters, stoves, blow dryers, and such, electricity is turned into thermal energy. Light bulbs and heating filaments in household devices range from about 1 to a few hundred ohms. Although in some cases heat is not the intended result (light bulbs), we always need to take into account the thermal energy they release. The electrical energy is turned into thermal energy because all those electrons wiggling around are going to be bumping into things. o When you have a lot of current, or high resistance, there are lots of those collisions, so lots of thermal energy is given off. Remember from a previous section that we had a formula for relating electricity to energy changing forms… q E V = ! E = Vq (Equation 1) But from way back in Science 10 we had a formula for the power as energy is changed from one form to another. t
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This note was uploaded on 02/29/2012 for the course PHYS 227 taught by Professor Rabe during the Fall '08 term at Rutgers.

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Power - Note-A-Rific: Power In everyday electrical devices...

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