A simple motor can be built using a coil of wire that is free to rotate between two opposite magnetic poles. When two magnets are placed close to each other, the magnetic fields affect each other produce a force. 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. If a wire carrying a current is placed inside this magnetic field, a force is produced. Qes physics department ks4 electricity and magnetism 10 topic outline file. Electricity powerpoint energy resources and energy transfer powerpoint forces and motion powerpoint radioactivity powerpoint the earth and beyond powerpoint waves powerpoint. A simple electric motor consists of the following parts.
Current is needed to rotate the armature,when current is passed through electric motor,the flux linked with the coil changes passing through the magnetic field due to which armature begins to rotate. Electric motors electromagnets higher edexcel gcse physics. In a motor, the wire is wound around a central block called an armature. The voltage is the force push or potential difference that pushes electrons around the circuit. Kelly the manual of free energy devices and systems, volume ii. In everyday life, there is a wide choice of electrical appliances available to buy. 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. The motor effect place a currentcarrying conductor in an external magnetic field perhaps between two bar magnets, and the fields will push against each other. The wire is pushed in the opposite direction if the direction of the current through it is reversed. These teaching approaches can be mixed to allow variety in course delivery. The size of the electric current is the rate of flow of electrical charge. The magnetic force produces a torque which is responsible for rotating the coil. Mainly a source of information about electric motors.
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. Axle in electric motors the commutator is attached to the axle. Physics 4 laboratory the electric motor dartmouth college. A gcse revision video designed to help you learn about the electric motor, force in a current carrying wire and interactions between magnetic fields. Take two bar magnets and keep the poles facing each other with a small space in between. May 31, 2017 a gcse revision video designed to help you learn about the electric motor, force in a current carrying wire and interactions between magnetic fields. Some of the material is first year degree standard and is quite involved for both for maths and physics. Gcse physics electromagnetism 3 the electric motor. Student book edexcel international gcse 91 physics develop.
This tutorial looks at the electric motor, flemmings left hand rule, electromagnetic induction, generators and transformers. Various energy sources can be used togenerate the electricity we need. The aqa gcse science textbooks are in the aqa approval process. Tes global ltd is registered in england company no 02017289 with its registered office at. Electricity notes gcse physics this means that if you want a current to flow you must put a battery in the circuit. When the switch is closed the coil spins on its axle. To make a cup of tea the kettle is switched on for three minutes.
How is electromagnetism used in our everyday lives. The simple electric motor physics homework help, physics. The torque on the coil varies, being a maximum when the plane of the coil is in the same direction as. Basic function of an electric motor is that its based on at least two magnets, which create rotational motion. Download if you would like to download a resource then click on the relevant attachment at the bottom of the page. Lesson this book is a textbook, not a laboratory or practical manual. Edexcel international gcse physics student book sample chapter. Hsc physics motors and generators notes dux college. Will need some activities to be added to be a full lesson. Electric motor what is a split ring commutator a split ring commutator sometimes just called a commutator is a simple and clever device for reversing the current direction through an armature every half turn see the previous page the commutator is made from two round pieces of copper, one on each side of the spindle. Electric motors revision and coursework igcse physics. Powerpoint has annotated answers to the worksheet questions. Apr 01, 20 in an electric motor the magnetic force does all the work.
From wikibooks, open books for an open world advancing physics. You will be provided with a kit of parts and equipment from which you will be challenged to build a working electric motor. If the magnetic field from the wire is placed in another magnetic field, they interact, causing the wire to move. 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. Tes global ltd is registered in england company no 02017289 with its registered office at 26 red lion square london wc1r 4hq. The current in each branch will add up to the total current through the battery. Useful, wasted, power rating, watts course overview. The current is the flow of electrons through a wire. During a morning it is used five times to make cups of tea.
Electromagnets and motors flashcards in gcse physics. They attract other pieces of iron bought close to them with a magnetic force. Electric motors higher a coil of wire carrying a current in a magnetic field experiences a force that tends to make it rotate. Rotational energy is a form of kinetic energy electric motors have a wide variety of uses how does a simple electric motor work the catapult effect motor effect is used to make a. Commutator a commutator is a copper ring split in two halves. Coiling the wire increases the strength of the magnetic field. Please practice handwashing and social distancing, and check out our resources for adapting to these times. This gcse physics electricity quiz takes a look at the motor effect. What is an electric motor an electric motor is a device that transfers electrical energy into rotational energy. Learners find the action of a commutator difficult to apply in the d.
In this invention the electric energy forces the matter to move. Gcse physics unit 1 revision book 2018 crickhowell high school. The catapult effect motor effect is used to make a simple electric motor spin round. Gcse, additional gcse, igcse and international cieedexcel o level. Efficiency of an electric motor calculation gcse keywords. Physics assignment help, principle of electric motor, an electric motor is a device which converts electrical energy into mechanical energy. Brushes the brushes connect the wire loop or armature to the power supply. A split ring commutator sometimes just called a commutator is a simple and clever device for reversing the current direction through an armature every half turn see the previous page. Khanacademy physics show 10 more 6 marker aqa gcse 2015 physics p3 question aqa 91 physics paper 2 revision prioritiespredictions the motor effect gcse aqa physics paper 2 predictions. Gcse physics circuits high demand questions questionsheet 1 a in the circuit below, lamps p and q are identical.
The essence of the electric motor is an electro magnet. When an electric current passes through a wire, it creates a magnetic field around the wire. Electric motor parts of motor, working of electric motor. Pearson edexcel level 1level 2 gcse 9 1 in physics 1ph0. Electromagnetic induction electromagnets and motors gcse physics single science revision bbc. Alevel physics advancing physicsmotors wikibooks, open. The frequency of the wooden bar is 2 hz and produces waves with a wavelength of 0. Gcse science a physics electricity linkedin slideshare. Hsc physics tutoring at dux college provides students with the right support to achieve a band 6 result in hsc physics.
Gcse electricity revision of the motor effect in wires. Magnets are materials normally with iron in them that produce a magnetic field. In a simple electric motor each half is connected to the ends of the wire loop. Students will construct electric motors, and through qualitative analysis. The strength of the magnetic field can be increased by the 3 c s. This website and its content is subject to our terms and conditions.
Gcse physics electricity in the home high demand questions questionsheet 3 an electric kettle has a power rating of 2. Khanacademy physics show 10 more 6 marker aqa gcse 2015 physics p3 question aqa 91 physics paper 2 revision prioritiespredictions the motor effect gcse aqa physics paper 2 predictions 15th june 2018 91. The diagram shows a simple motor using direct current. A simple electric motor uses current and permanent magnets. Gcse science physics 91 the electric motor youtube. Knowing how current, charge and power are calculated is extremely helpful in gcse physics when considering electrical circuits. 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.
The commutator is made from two round pieces of copper, one on each side of the spindle. Voltage is a measure of how much electrical energy a certain amount of electrons can transfer as they flow. In an electric motor the magnetic force does all the work. They are all designed to transfer electrical energy into other forms of energy, but not all. The direction of the force will depend on the direction of the magnetic field and the direction of the current in the field. 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. It can be easy, particularly if you get the main terms right. Content additional notes from dr c electric current is a flow of electrical charge. Oct 12, 2014 an electric motor is basically a machine, which has only one job. Electric motors electromagnets higher edexcel gcse.
May 17, 2015 this website and its content is subject to our terms and conditions. Place a currentcarrying conductor in an external magnetic field perhaps between two bar magnets, and the fields will push against each other. 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. Static and current electricity scool, the revision website. Today i am showing you how to make a very simple joule thief. Measured in degrees o c or kelvin k thermal energy is measured joules j things are cold because the average energy is low things are hot because the average energy is high temperature. Armature or rotor this consists of a thin copper wire coiled around an iron core, hence when electric current flows it acts as an electromagnet. Flemings left hand rule and the motor effect duration. How to make a simple electric motor fun science, science.
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 following student books have been selected for aqas official approval process. The working of an electric motor is based on the fact that a current carrying conductor produces a magnetic field around it. Before discussing the motor effect it is important to gain an understanding in magnets and magnetic field.
How a childrens book can teach writers about engaging storytelling. Motors use the effect of forces on currentcarrying conductors in magnetic fields 1. Please dont give me a page to read, just at most 23 paragraphs. Current electricity is a flow of charged particles in all dry conductors the flow is of electrons electrons flow from negative to positive conventional current flows from positive to negative although conventional current doesnt really exist. Static and current electricity topic for gcse physics including revision notes, revision guides and question banks. Finally, a comparison between different motors is presented. Electric motor flemings fleming flemings left hand rule magnetism motion lorentz commutator force magnetic field. 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. This is a set of hsc physics dotpoint summary notes for motors and generators. When a current flows through a wire a magnetic field is produced, although the field produced is weak. This magnetic force is produced because of the magnetic field which is due to the permanent magnet. To better understand, imagine the following situation.
Aqa gcse biology student book 97814718539 early 2016. An electrical motor is a device that converts electrical energy to mechanical energy. Teachers may select the approach that best meets the needs of their students. This is where teaching and learning resources can be downloaded and added. Current is represented by the symbol, i current is measured in amperes amps or a with an ammeter one amp is equal to the flow of. 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. This approach is based on the salters horners advanced physics shap project. We mustcarefully consider the advantages anddisadvantages of using each energy sourcebefore deciding which energy sources itwould be best to use in any particularsituation. Gcse physics science revision section covering circuits, electricity, current, voltage, resistance, current in a series circuit, current in a parallel circuit, voltage in a series circuit, voltage in a parallel circuit, resistance through components, charge in circuits and energy in circuits.
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