Electric motors revision and coursework igcse physics. What is an electric motor an electric motor is a device that transfers electrical energy into rotational energy. However, remember that forces come in pairs the permanent. Using a simple motor as a generator if a simple motor is turned to produce electricity, the split ring commutator will change the current direction every half turn. Electric motors electromagnets higher edexcel gcse physics. The simple electric motor physics homework help, physics. A metal coil sits in a magnetic field and is connected flemings lefthand rule can be used to explain why the coil turns.
A simple electric motor can be built using a coil of wire that is free to rotate between two opposite magnetic poles. Before discussing the motor effect it is important to gain an understanding in magnets and magnetic field. These are made by coiling wire carrying a current around a magnetic core. Download principle of engineering physics vol 1 by a s. Edexcel international gcse physics student book sample chapter. The features the perfect grounding for students intending to take their studies to a more advanced level, explaining physics contains all the essential concepts required by students studying physics within any. Gcse, additional gcse, igcse and international cieedexcel o level. Please practice handwashing and social distancing, and check out our resources for adapting to these times. Covering topics ranging from motor energy and efficiency to computeraided design and equipment selection, this reference assists.
This topic covers practical electric circuitry of o level physics. In a motor, the wire is wound around a central block called an armature. Electric motors and drives is intended for nonspecialist users of electric motors and drives, filling the gap between theorybased academic textbooks and the more prosaic handbooks, which provide useful detail but little opportunity for the development of real insight and understanding. Magnets are materials normally with iron in them that produce a magnetic field. Electromagnets and motors flashcards in gcse physics. The working of an electric motor is based on the fact that a current carrying conductor produces a magnetic field around it. A gcse revision video designed to help you learn about the electric motor, force in a current carrying wire and interactions between magnetic fields.
Content additional notes from dr c electric current is a flow of electrical charge. A complete treatise on the construction and management of electrical apparatus as used in electric lighting and the electric transmission of power. E fq0 the direction of the electric field is the direction of the force. Pdf basic electrical engineering 1st year ebook, notes. Gcse physics electromagnetism 3 the electric motor. Gcse science physics 91 the electric motor youtube. The wire is pushed in the opposite direction if the direction of the current through it is reversed. Nc voltsmetre using coulombs law we can now evaluate the electric field due to a point charge. How is electromagnetism used in our everyday lives.
If a wire carrying a current is placed inside this magnetic field, a force is produced. Electric motor produced by the national stem centre and the institute of physics, this video shows a simple method for making an electric motor using a battery, strong magnets and a copper coil. Electric motor parts of motor, working of electric motor. Here are two simple animations illustrating how relays use one circuit to switch on a second circuit. A simple motor can be built using a coil of wire that is free to rotate between two opposite magnetic poles. This approach is based on the salters horners advanced physics shap project. Gcse physics electromagnetism medium demand questions questionsheet 12 a a simplified electric motor consists of a coil of wire connected to a battery and positioned between two magnets see diagram. Electricity, simple circuits flashcards in gcse physics. Explaining physics emphasizes the applications and social effects of physics, and extends its treatment of energy and electronics. Electric motors and loudspeakers both use electromagnets. Transients in rl, rc and rlc circuits with dc excitation. Current, voltage and resistances the main problem with electricity is that everyone uses it all the time, so they think they know how it works already. Finally, a comparison between different motors is presented. These teaching approaches can be mixed to allow variety in course delivery.
This website and its content is subject to our terms and conditions. Pearson edexcel level 1level 2 gcse 9 1 in physics 1ph0. It works on the principle of the interactions between the magnetic fields of a permanent magnet and the field generated around a coil conducting electricity. The book explores all of the widelyused modern types of motor and drive, including conventional and. Construct a simple spectrometer, from a cd or dvd, and use it to analyse common light. Some of the material is first year degree standard and is quite involved for both for maths and physics. Fossil fuels coal, natural gas and oil which were formed hundreds of million years ago and will eventually run out. Gcse electricity revision of the motor effect in wires. Physics 4 laboratory the electric motor dartmouth college. Introduction to experimental physics by fretter, william b. When the switch is closed the coil spins on its axle. Understand why a force is exerted on a currentcarrying wire in a magnetic field, and how this effect is applied in simple d.
This is where teaching and learning resources can be downloaded and added. Electric power and energymeasurement of electrical power an. Teachers may select the approach that best meets the needs of their students. Useful, wasted, power rating, watts course overview.
You will be provided with a kit of parts and equipment from which you will be challenged to build a working electric motor. They attract other pieces of iron bought close to them with a magnetic force. Notice that as the coil rotates the forces on it remain the same but reverse in direction as the coil rotates and the current direction through the coil changes. Instead of generating alternating current see the previous page the current is kept positive giving the output shown below compare this with the output shown for direct current. When creating a force, use flemings left hand rule to determine in which. To better understand, imagine the following situation. The size of the electric current is the rate of flow of electrical charge. A small electric motor vibrator is connected to cause the disturbance which produces waves. An electric current in a conductor produces a magnetic field. Tes global ltd is registered in england company no 02017289 with its registered office at 26 red lion square london wc1r 4hq. An electrical motor is a device that converts electrical energy to mechanical energy. Further development means that additional free materials may also be added in the future. It allows students to investigate flemings left hand rule and the forces generated in an electric motor.
Physics notes form 3 free download kcse revision notes pdf. Schematic of a simple transformer with two coils wound around a. The catapult effect motor effect is used to make a simple electric motor spin round. Revised national curriculum edition of gcse 9780748762361. Buy principle of engineering physics vol 1 by a s vasudeva pdf online. The electric motor electromagnets and motors gcse physics. Please dont give me a page to read, just at most 23 paragraphs.
Electric motors electromagnets higher edexcel gcse. It consists of a rectangular coil of wire mounted on a spindle so that it can rotate between the curved pole pieces of a ushaped permanent magnet. Electric motors, which convert electrical energy into mechanical. The direction of the force will depend on the direction of the magnetic field and the direction of the current in the field. Physics 4 laboratory the electric motor prelab exercise please read the procedure section and try to understand the physics involved and how the experimental procedure works.
Free support resources for physics for you 5th edition this page is being updated regularly with free support resources to use alongside gcse physics for you 5th edition. Current this is a measure of the flow of electrons around a circuit measured in amperes or amps a voltage this is a measure of how much energy the electrons are carrying. How to make a simple electric motor with images fun. It can be easy, particularly if you get the main terms right. In an electric motor the magnetic force does all the work. Explain how electric motors, generators, and transformers work. Electromagnets electromagnets and motors gcse physics. Presenting current issues in electric motor design, installation, application, and performance, this second edition serves as the most authoritative and reliable guide to electric motor utilization and assessment in the commercial and industrial sectors. The diagram shows a simple motor using direct current. Follow the simple directions to build an electric motor, then investigate how a few simple changes to the magnets in the motor can greatly effect the motors. Equivalent to american high school diploma subtopics. Download if you would like to download a resource then click on the relevant attachment at the bottom of the page.
Take two bar magnets and keep the poles facing each other with a small space in between. Efficiency of an electric motor calculation gcse keywords. Jun 9, 2015 kids learn how to make a simple electric motor in this great engineering science fair project that teaches them how current generates its own magnetic field. Students will construct electric motors, and through qualitative analysis. The tricky bit is to supply electric current to a rotating coil, and to maintain a steady, continuous torque. When an electric current passes through a wire, it creates a magnetic field around the wire. Motors, generators, and transformers hs physics openstax cnx. Place a currentcarrying conductor in an external magnetic field perhaps between two bar magnets, and the fields will push against each other. If the magnetic field from the wire is placed in another magnetic field, they interact, causing the wire to move. The torque on the coil varies, being a maximum when the plane of the coil is in the same direction as. You need to be a registered member free to see these links. Single phase emf generation, average and effective values of sinusoids, j operations, complex representation of impedance, phasor diagrams, power factor. Gcse revision notes physics revision notes electricity 1. The text that was researched and compiled contains explanations of the motor parts, theory about electromagnetism and how current is used to make an electrical motor rotate.
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