ELECTRIC CIRCUIT Animation of the movement of electrons (the opposite of conventional current) in a simple electric circuit consisting of a battery, a switch, and a light bulb. These are the three basic building blocks required to manipulate and utilize electricity. A pump When beginning to explore the world of electricity and electronics, it is vital to start by understanding the basics of voltage, current, and resistance. A Transportation Analogy for Electricity. Faucet = Switch. This energy is described by stating its voltage (1 volt = 1 joule/coulomb = energy/charge). The water hose analogy holds water (sorry I couldn't resist that pun) for the basic principles. /* 003366 */ First we'll cover co… At a power plant, charge can be drawn from the earth and the generation process does work on the charge to give it energy. Let’s compare it to something we know --- Water! theoretical.--68.0.124.33 05:07, 3 October 2008 (UTC) drain-pipe theory' by Oliver Heaviside. google_ad_height = 90; The animation was written by David M. Harrison in April 2003. This animation was inspired by a physical demonstration designed by Joe Vise. The ground wire protects against electric shock and in many cases provides shielding from outside electrical interference. m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m) Water flowing through pipes loses pressure, just as current flowing through a resistor falls to lower voltage. Electric Circuits. (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){ google_ad_width = 728; Water flowing through pipes is pretty good mechanical system that is a lot like an electrical circuit. The fact that essentially all the voltage drop appears across a resistor or an ordinary electrical appliance makes possible the operation of such appliances from an extension cord, or the operation of several appliances in parallel on a single circuit in your home. Electric circuit analogies. Since electric current is invisible and the processes at play in electronics are often difficult to demonstrate, the various electronic components are represented by hydraulic equivalents. Simulation | Physics and Chemistry by a Clear Learning in High School, Middle School, Upper School, Secondary School and Academy. Current: Again this is a common quantity. (Static Electricity) When the imbalance of charge becomes too great, the electrons will move. Charge (coulombs) is like water volume (liters), voltage is like water pressure (kPa or PSI), current (amps) is like water flow rate (liters per second). 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. You can operate most appliances at the end of an extension cord without noticeable effects on performance. ga('send', 'pageview'); . Since electric current is invisible and the processes at play in electronics are often difficult to demonstrate, the various electronic components are represented by hydraulic equivalents. Why should you understand electricity Current and amperes Potential difference and volts Relationship between potential difference and current Sources of potential difference Concept of resistance Ohms Law DC and AC current Pipe = Wiring. PCCL | jean pierre fournat A common technique to solidify understanding is to learn the hydraulics analogy of electricity, which is arguably easier to visualize than electricity itself. ga('create', 'UA-1458028-8', 'auto'); The movement of electrons through a conductor. The function of a ground wire in an electric circuit is in many ways analogous to the reservoir attached to the water circuit. If the single elements represented are the only resistances in the circuit, then essentially all the pressure or voltage will drop across these single elements. – Like potential energy at a water fall. The Earth is just a good conductor of charges, but like all electrical circuits, must ultimately make a closed circulation path in order to conserve charge ( a hard and fast conservation law). Very little voltage drop occurs along the wire because of its small resistance. Electric current flow is proportional to voltage difference according to Ohm's law, and both the bird's feet are at the same voltage.Since current flow is necessary for electric shock, the bird is quite safe unless it simultaneously touches another wire with a different voltage.. Want a scary job? Increasing the resistance (R in ohms) will proportionately decrease the current which may be driven through the circuit by the voltage. The resistance to flow represented by a severe constriction in a water pipe is analogous to the resistance to electric current represented by a common electric "resistor". The charge upon which the work is done at the power plant does not have to be transported cross-country, and the "spent" charges do not have to be transported back to the power plant, but just dumped into the "reservoir". Current Electricity. In this analogy, energy is charge x voltage (coulombs x volts = joules) or for water it's volume x pressure (liters x kPa = joules); power is voltage x current (volts x amps = watts) or for water it's pressure x flow rate (kPa x LPS = watts). Use it to introduce the concepts of voltage (pressure) and current (flow rate), but don't go too far with it. ELECTRIC CURRENT is the flow of charge. 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