An electric current is a flow of electrons through a conductor (like a copper wire). Increasing voltage increases current (electron) flow. The analogy isn't perfect, but it certainly helps to intuitively recall, if you will, the basic principles and relationships. In general terms, charge is water, voltage is the pressure of water, current is the flow of the water. I personally like this because it's very understandable but I have a question about how this works with resistors. Electric circuit analogies. It is doubtful that anyone involved in electricity or electronics is not familiar with the much-used analogy between electrical volts, current, and resistance with water pressure, flow, and constrictions, respectively. Since we can't see electrons, it would be nice to have a model or an analogy of electric circuits to help us understand circuits better. Flow of water: Imagine that there are two tanks with different amounts of water and the two tanks connected to each other at the bottom with a hose/ pipe. It becomes more difficult for simple AC circuits but you can view inductance as inertia (from a weighted piston in the pipe for example) and capacitance as a chamber with an elastic membrane between the input and output. If the Lego motor is allowed to spin freely, it will spin at a very high rate; however, when the motor is hooked up to the pump as is shown in Figure 0, the water will begin to flow but at a slower rate due to the natural resistance of the water. Let us start with a pump in a loop of water where the pump is powered by a small motor powered by a battery. The Volume of water represents the Amperes (Amps/Current). Ohm’s Law also makes intuitive sense if you apply it to the water-and-pipe analogy. Question: (Figure 1) Consider the following water circuit: water is continually pumped to high pressure by a pump, and then funnelled into a pipe that has lower pressure at its far end (else the water would not flow through the pipe) and back to the pump.Two such circuits are identical, except for one difference: the pipes in one circuit have a larger diameter than the pipes in the other circuit. Sometimes calculating parameters and behaviour of some objects may be much easier when using analogy to objects with well developed theory and calculation methodology. Similarly, the higher the voltage, the higher the current. Capacitor Water Pipe Analogy —I •In the water pipe analogy, a capacitor is thought of as a water pipe: – with a rubber diaphragm sealing off each side of the pipe and –a plunger on one end. Electricity is basically the set of physical phenomena associated with the presence and motion of electric charge. The tank can only push water one way: out the hose. The Waterfall Analogy. In fact, that is the main property of electricity that early … Continue reading "What is electricity – Water analogy" When describing voltage, current, and resistance, a common analogy is a water tank. C.R. The main difference is that water will fill any space whereas electricity will ‘fill’ only a conductor. Water flows because there is a difference of either pressure head or elevation head or velocity head in their end to end flow profile. The higher the pressure, the higher the flow of water. flow rate models current and water pressure models voltage) describe the limitations of the water analogy to electric … If we have a water pump that exerts pressure (voltage) to push water around a ”circuit” (current) through a restriction (), we can model how the three variables interrelate. The water/hose analogy for electricity is useful for explaining voltage, current, and power. The teaching of electricity probably leads to more misconceptions than any other topic in science. The Analogy. Whereas, water can be observed directly, as well as how it effects things. Electricity Explained - Intro For a long time, folks have been wrestling to come up with a comprehensive analogy for basic electrical terms and functions. Subscribe to ebilling to receive your bills by email. The analogy is accurate but the difference is that mass is a property of the water (or other fluid) whereas the inductance is not a property of the electricity but a property of the pipe work carrying the electricity. Generally pressure difference makes the sense. First we'll cover component comparisons to real systems, followed by a bit about general analogies between electricity and water flow themselves, and finally a few places where the analogy breaks down. Wikipedia has an entry on it entitled "Hydraulic Analogy" in The Volt is the SI unit of measurement of this potential. The water analogy is a fitting introduction; it was used by the physicists at a state's ISO (Independent Systems Operator that oversaw the reliability of the state's electricity grid) to explain how they route electricity to ensure power flows where needed. We think it does a great job of explaining electricity in really straightforward terms, with an imaginative use of a water pump as an analogy. A Transportation Analogy for Electricity. Electricity can not be observed directly, but how it effects things can. Nave, Water circuit analogy to electric circuit Part 1, HyperPhysics, Georgia State University, 2008. References. Electricity and Water Analogy Learning Goal: To understand the analogy between water pressure, water flow, voltage, and current As suggested by the fact that we call both currents, the flow of charged particles through an electrical circuit is analogous in some ways to the flow of water through a pipe. If we draw an analogy to a waterfall, the voltage would represent the height of the waterfall: the higher it is, the more potential energy the water has by virtue of its distance from the bottom of the falls, and the more energy it will possess as it hits the bottom. So, here it is. Water flowing through pipes is pretty good mechanical system that is a lot like an electrical circuit. In this analogy, the pressure is the voltage, and the flow of water is the current. The water analogy works ok for DC circuits, where resistance can be viewed as a restriction or valve to the water flow. Do not ask if there is a water analogy for every electric circuit element. The voltage is equivalent to the water pressure, the current is equivalent to the flow rate, and the resistance is like the pipe size. There is a basic equation in electrical engineering that states how the three terms relate. When I was first introduced to electricity, and electrocution, I was given an analogy of a water pipe. Current is proportional to the diameter of the pipe or the amount of water flowing at that pressure. Similar to our DC-producing battery, once the tank is empty, water no longer flows through the pipes. With a water pipe, you have four factors that influence the flow of water. Power is the total amount of water flowing in given time. Note: Please login to use the service. Go eBill. Electricity Basics. to wire diameter) by thinking of electricity as a water. An analogy for Ohm’s Law. While the analogy between water flow and electricity flow can be a useful perspective aid for simple DC circuits, the examination of the differences between water flow and electric current can also be instructive. You can access the full range of EWA services with eKey with more advanced features. It can, but don't make too big a deal of it. I dunno; as an aerospace engineer, I found it easier to remember the resistance formula (Resistance is proportional to length, but inversely prop. In this analogy, voltage is equivalent to water pressure, current is equivalent to flow rate and resistance is equivalent to pipe size. Services with eKey login. Teacher Section – Water Analogy to Electric Circuits Behavioral Objectives: Upon completion of this lab a student should be able to: identify the electrical analogs to the water circuit components (e.g. The the most prevalent analogy for understanding electricity is the water hose one. Hello please tell me the name of a book that covers all topics of electricity by water analogy.My teacher gives me easy examples of daily life by which it is very very easy to understand electricity.for example last time he gave me example of parallal circuits, i.e 3 road joining one road so traffic will be divided ,so in such a circuits current will be divided. It should not be hard to noticed that electricity acts on certain things in many ways similar to water. A common technique to solidify understanding is to learn the hydraulics analogy of electricity, which is arguably easier to visualize than electricity itself. If you as a student continue to think about electric current as water current, you will will, after a while, start making incorrect assumptions. The rope loop. If the plant can’t keep up with the demands, we experience brown outs (a shortage of electric power), just like water users at the end of a river would run short on water if the pump were too slow. Yes – the analogy is not perfect, but it is helpful and understanding will come not only from the similarities but also from the differences. To understand this better, we shall look at the water flow analogy. In the water-flow analogy, sometimes used to explain electric circuits by comparing them with water-filled pipes, voltage (difference in electric potential) is likened to difference in water pressure. Unlike the water pump in our river analogy, however, the power plant automatically adjusts to meet the demands of the consumer at the end of the wires. In earlier article we analysed power dissipation of electronic devices using Ohms law where Voltage=temperature, Current=Dissipation and Resistance=Thermal resistance. A system of water pipes is often used as an analogy to help people understand how these units of electricity work together. The pressure in the pipe represents the Voltage (Volts). In his critique of the water analogy, he points out several situations where an application of the water analogy would be misleading. Use it to introduce the concepts of voltage (pressure) and current (flow rate), but don't go too far with it. A neat analogy to help understand these terms is a system of plumbing pipes. Water analogy: Voltage is defined as difference of potential. The rope loop The band saw Water flowing in a pipe 'The water circuit' Uneven ground A ring of people each holding a ball The number of buses on a bus route Hot water system Horse and sugar lump Train and coal trucks Gravitational Rough sea Crowded room. I understand that resistors will limit current which because of ohms law will affect the voltage but in a hose, decreasing the hose diameter (current) would increase the water pressure (voltage). Other hydraulic analogy websites: Water circuit analogy to electric circuit from HyperPhysics by C. Rod Nave, Georgia State University Excellent resource for physics students Hydraulic analogy, Wikipedia Brief Wikipedia article, good overview Understanding Electricity with Hydraulics Voltage is the electromotive force that moves the electrons through the wire. To create voltage, magnets are used. Submit the readings for Electricity and Water meters against any account. Voltage is analogous to water pressure in a pipe. 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