Sometimes calculating parameters and behaviour of some objects may be much easier when using analogy to objects with well developed theory and calculation methodology. Here you represent an electron and the other people represent the lattice of positive ions in a metal. The speed of the boat represents the random thermal movement of the electrons in a wire, which is very fast. Since the trucks don't use the coal they're carrying you slightly lose the link that big voltage (i.e. $i=\frac{V}{R}+\frac{1}{L}\int Vdt+C\frac{\text{d}V}{\text{d}t}$ (Equation 5). By comparing Equation 1 and Equation 3, we will get the analogous quantities of the translational mechanical system and electrical system. If you as a student continue to think about electric current as water current, you will will, after a while, start making incorrect assumptions. What happens when the chair lift / battery is turned off? Molecules and electrons A small resistor is like going through the express lane with only one item. As each truck passes a point it picks up coal from a big heap (the battery) and delivers it where it's needed (the load). 16. Instead of a pump with constrictions you have a boiler with radiators. Gravitational The above characteristic equation for a resistor is true at all moments in time; the voltage drop across this circuit element simply tracks the instantaneous rate of current flow with R as the proportionality constant. It's not very good at explaining voltage or power. This tends to slow the progress of the balls everywhere in the circuit. The boiler puts heat energy into the system, like a battery and the radiator transfers heat energy out of the system. While working on an analog signal, an analog circuit alters the signal in some manner. The middle leg is where the most energy is converted. Nave, Water circuit analogy to electric circuit Part 1, HyperPhysics, Georgia State University, 2008. In force current analogy, the mathematical equations of the translational mechanical system are compared with the nodal equations of the electrical system. port is open to atmospheric pressure p. atm. The function of a ground wire in an electric circuit is in many ways analogous to the reservoir attached to the water circuit. However, as electrical network analysis matured it was found that certain mechanical problems could more easily be solved … A ring of people each holding a ball. Once the pipe is filled with water, the pump can circulate the water without further use of the reservoir, and if it were removed it would have no apparent effect on the water flow in the circuit. There are some similarities and differences between magnetic and electric circuits. Even if you know the answer to this question do you think students have a good grasp of domestic heating installation? Train and coal trucks An example of a power source is the quantity qin the diagrams for the thermal capacitance, above. The analog of is current, and the analog of the temperature difference, , is voltage difference.From this perspective the slab is a pure resistance to heat transfer and we can define Nov 25, 2013 - Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. Launch CircuitLab or watch a quick demo video → Question:  if you want your radiators to heat your room as quickly as possible do you want the water to flow through them very quickly or very slowly? Electricity and the Waterfall Analogy Last updated; Save as PDF Page ID 284; Introduction; The Waterfall Analogy ; Ohms Law; To discuss electrochemistry meaningfully, the fundamental properties of electricity must be defined. 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