21 reviews of Tiffany & Company I was pleasantly surprised with the customer service at this location. I had it in my head that they would be beyond pretentious, from what I have heard in the past; but what I found were helpful salespeople,â¦
Thermionic generators convert heat or light into an electric current by using the temperature difference between two metallic plates that are separated by a vacuum. The hot plate is heated either by incident light or thermal conduction and this causes electrons to evaporate from its surface.
The power supplied to a circuit by a battery is calculated using P = VI. Batteries and power supplies supply power to a circuit, and this power is used up by motors as well as by anything that has resistance. The power dissipated in a resistor goes into heating the resistor; this is know as Joule heating. In many cases, Joule heating is wasted energy.