Introduction: (Initial Observation)

In a closed electrical circuit, resistance the the components and also the voltage of power resource are affecting the electrical current. Present is the rate of flow of electrons. Knowing how these conditions can change, is the vital to designing and building any kind of electric circuit. For instance suppose that your power source or battery calculation is 12 volts and the only form of light bulbs that you have access to space designed for 3 volts. How have the right to you minimize the voltage of your battery to enhance your light bulbs?


(Remember the a 3 volts bulb will certainly blow up soon if you affix it come 12 volts battery.)

In this project you will experiment various electric circuits in stimulate to discover out the components that affect the voltage, resistance and electric current.

You are watching: Which factors determine the amount of electric current in a circuit


This project guide has information that you need in stimulate to start your project. If girlfriend have any questions or need much more support around this project, click on the “Ask Question” button on the height of this page to send me a message.

If girlfriend are brand-new in doing science project, click “How come Start” in the key page. Over there you will certainly find helpful links that describe different species of science projects, clinical method, variables, hypothesis, graph, abstract and also all other general basics the you should know.

Project advisor

Information Gathering:

Find out around electric circuits and factors that influence the circulation of electron in the materials of an electric circuit. Read books, magazines or ask professionals who might know in order come learn around voltage, resistance and also electric current. Save track of whereby you obtained your details from.

It deserve to be an extremely easy come learn around electricity if you to compare it to a water mechanism with pipes, pumps, tanks and also valves. Battery is basically like a water tank. Wires are like pipes, switches are prefer valves and also light bulbs are prefer water filter (resistance) and also electric motors and also electromagnets are like water turbines. Through this analogy every problem of an electric circuit have the right to be contrasted with a water mechanism to break up the result of any adjust in worths or design.

Some simple Information:

It is more than likely safe to assume that everyone analysis this page has come into contact with a flashlight. Have actually you ever before taken a flashlight apart? Not just to replace the batteries, but to investigate every component of the flashlight? The flashlight is not a very complex device. What components are provided to make up a flashlight? Basically, there space three main components. The batteries, which supply the power to power the flashlight, room the key component. The light bulb, i beg your pardon illuminates when existing is passed v it, is the next significant component. The connecting structure, which might consist that copper bands and also a switch, help connect or disconnect the power source (battery) native the fill (light bulb).

In plenty of engineering fields, that is practically to develop a language for interacting information and ideas. Electric circuits is no different. In electric circuits, the electrical devices are not attracted pictorially, yet instead lock are attracted schematically. Thus, a diagram deserve to be drawn that schematically catches the main essence of the flashlight’s operating principles. Because the flashlight is together a simple device, its schematic diagram must be basic to monitor or understand. Because that some arrival to electricity and also some schematic symbols, visit or if you simply want to see some symbols, visit

Once a schematic chart is available, how can one analyze the system? First, us should allude out that we will commonly refer to diagrams like number 2-3 as a circuit. A circuit is merely an interconnection of electrical components, e.g., a source and a fill in the flashlight circuit. The interconnections space made v lines, which represent wires or steel busses, in an electrical circuit. Electric circuits do it an ext convenient to analysis electrical gadgets versus fancy sketches the the physics devices. However, together you occupational through this module, friend should try to mentally snapshot the true physical system that is being represented by the electric circuit or schematic diagram. You will certainly actually end up being a better problem solver if you room able to establish a connection between physical systems and also the much more academic circuit diagrams supplied for analysis.

See more: How To Connect 9 Dots With 3 Lines, Nine Spots With 3 Straight Lines

What have the right to we deduce about the flashlight circuit based on our understanding of watts, voltage, and current indigenous the Introduction? The batteries enable us to obtain a handle on the voltage being provided in the circuit. If we have actually two 1.5 volt batteries linked end-to-end (in series), then the supply voltage in our circuit have to be about 3 volts. What else perform we understand or can we learn by assessing the component components of the flashlight system more closely? If us look really carefully in ~ the light bulb, it may be possible to gather more data top top this ingredient of the flashlight circuit. For example, a very tiny flashlight had a irradiate bulb through the complying with information imprinted top top its side: 2.2 Volts and 0.25 Amps. Thus, the irradiate bulb have to like to operate with 2.2 volts throughout it and also 0.25 amps flowing through it. The light bulb deserve to then be modeled by a circuit element that has 0.25 amps of current flowing through it as soon as 2.2 volts room dropped across the device. As we will find out in the following section, a an equipment that has actually these properties is a resistor. For analysis purposes, we can replace the schematic depiction of the light bulb v the schematic symbol because that a resistor and create a new electrical circuit that models the same flashlight mechanism as in number 2-3.