The magnetic field then causes a force with a magnet that causes movement or spinning that runs the motor. This booklet will be the equivalent of 2 set homework tasks and will be handed in. Great explanation of split ring commutators gcse physics, physics. Electromagnets electromagnets and motors gcse physics. Photo by jason jacobowitz courtesy of us navy the link between electricity, magnetism, and movement was originally discovered in 1820 by french physicist. These two half cylinders are fixed on the axle of the motor and rotate with the coil. It is the rotating interface of the armature coil with a stationary circuit. 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. Here is a fun way to explore the inner workings of a simple motor. The wire is pushed in the opposite direction if the direction of the current through it is reversed. These are made by coiling wire carrying a current around a magnetic core. Electric motors higher electromagnets aqa gcse physics.
One of the important applications of electromagnetism is the electric motor. The armature holds the rest of the components and is also the part of the motor that spins. See more ideas about physics, general physics and physical science. Around the armature is the stator, which holds insulated coils of wire, usually copper. A simple experimental demonstration will show you that this is true. Place a currentcarrying conductor in an external magnetic field perhaps between two bar magnets, and the fields will push against each other.
However, remember that forces come in pairs the permanent. Edexcel international gcse physics student book sample. The magnitude of torque involves sintheta that decreases as the. 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 powerpoint and worksheet with answers. Gcse sciencethe motor effect wikibooks, open books for an.
Igcse electricity revision booklet teaching resources. Gcse physics electric motor what is a splitring commutator. Electric motors and generators physics animations and. How to make a cheap, simple dc commutator motor from. 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. This is a great project for use in the classroom or at home.
Aqa physics gcse exam style questions p4 electric circuits. Before discussing the motor effect it is important to gain an understanding in magnets and magnetic field. A first wire wire 1 connects the positive terminal of the first battery with the negative terminal of the second battery. For webquest or practice, print a copy of this quiz at the physics. Gcse science physics 91 the electric motor youtube. The motor effect is the term used when a currentcarrying wire in the presence of a magnetic field experiences a force. 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. Gcse aqa physics lesson on series circuits using key content from aqa exam specification. Delivery guide for ocr gcse 91 physics a gateway science. Physics tutorials for gcse, igcse,as and alevel vivax. This is a comprehensive tutorial on electricity, covering all the major topics that come under gcse, igcse and alevel specifications in the uk and the commonwealth for all major exam boards.
A student used a simple transformer to investigate how the number of turns on the. A metal coil sits in a magnetic field and is connected flemings left hand rule. The central part of the motor is a cylinder called the armature or rotor. A series of free gcseigcse physics notes and lessons with examples and solutions.
Gcse physics or combined science revision duration. By understanding how a motor works you can learn a lot about magnets, electromagnets and electricity in general. 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. This is a resource page from physclips, a multilevel multimedia introduction to physics download the animations on this page. The simple electric motor physics homework help, physics. In our example input electrical power of the motor is 0. Jul 10, 2017 the blue side panels and background shading indicate content for physics international gcse students only. The motor effect is the term used when a current carrying wire in the presence of a magnetic field experiences a force. 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. Build a simple dc motor with brushes and commutator short version and build a dc motor step by stop stepbystep version by tim callinan. The ends of the coil are connected to two half cylinders well ok, slightly less than half, usually made of brass. The electric motor electromagnets and motors gcse physics. Build a simple electric motor science buddies, october 16, 2017. Electric motors and generators physics animations and film.
We had all studied quite a lot of physics before so it was pretty easy to come up with many formulas that have an effect in the physics of an electric motor. Draw arrows on the picture to show the path of the electricity. Electric motors and loudspeakers both use electromagnets. Awardwinning tutorials, tips and advice on electricity. You are expected to attempt all questions in the booklet. All the questions on this quiz are based on information that can be found at physics. The blue side panels and background shading indicate content for physics international gcse students only. 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. Electric motors electromagnets higher edexcel gcse. A simple electric motor powered by two batteries connected in series. An electric motor creates rotational, or circular, motion. We use dozens of devices in which electric motors are used, such as, refrigerators, mixers, fans, washing machines, computers, etc. As the content is for triple science students, the lesson has been aimed at high ability.
Gcse igcse the solar system with real timing boyles law charless law the physics of football and penalty electricity tutorial electromagnetic induction logic gates red shift colour making and light filters solar and lunar eclipses electric bell electromagnetic relay electrostatics induction, lightning, lightning conductor electrolysis. Electric motors generate magnetic fields with electric current through a coil. How to calculate the force on a currentcarrying wire. An electric motor converts electrical energy into physical movement. The electric motor electromagnets and motors gcse physics single science revision bbc bitesize. Commutator a commutator is a copper ring split in two halves. When this motion is used to ensure that the current keeps changing relative to the magnetic field, the motion will continue, and so we have an electric motor. Making your own motor is an excellent introduction into the world of technology. Revision booklet for the edexcel igcse electricity unit. When an electric current flows through the coil, the coil experiences a force. The diagram shows a simple motor using direct current. Gcse electricity revision of the motor effect in wires. Common misconceptions or difficulties learners may.
Gcse ocr gcse 91 physics b twenty first century science. The commutator is made from two round pieces of copper, one on each side of the spindle. They attract other pieces of iron bought close to them with a magnetic force. Aqa physics exam style questions p4 electric circuits. Physics igcse 2012 exam revision notes by samuel lees and adrian guillot 1.
Electricity flows from the negative side of a battery, through the wires, and lights the bulb. The direction of the lines of force around a wire carry a current can be determined using the righthand grip rule. The other side will feel a force pushing it downwards, so the loop will rotate. Gcseigcse physics solutions, examples, worksheets, videos. Physics aqa gcse nick england steve witney sample chapter this title has been selected for. See more ideas about electrical engineering, electrical projects and electronic engineering. P15 homework booklet 214 229 use gcse physics book. This gcse physics electricity quiz takes a look at the motor effect. Place a wire that is connected to a power pack in between the poles of a horseshoe magnet. Just as a moving magnetic field induces current in conductors, a changing current in a magnetic field induces motion.
A simple electric motor can be built using a coil of wire that is free to rotate between two opposite magnetic poles. Rotate to landscape screen format on a mobile phone or small tablet to use the mathway widget, a free math problem solver that answers your questions with stepby. Electric motor an interactive application in which the user can set voltage, number of magnets and number of coils on a simple virtual motor to observe the effect on its motion. Jul 12, 2011 revision booklet for the edexcel igcse electricity unit. The ability to take a topdown view is helpful in this application.
The electricity continues to travel around to the positive side of the battery. The path that electricity follows is called a circuit. The whole of edexcel magnetism and the motor effect. Science and maths by primrose kitten recommended for you. The shiny metal hes using may look like gold, but its actually copper, a good conductor that is much less expensive. 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. A gcse revision video designed to help you learn about the electric motor, force in a current carrying wire and interactions between magnetic fields. A simple electric motor consists of the following parts. How are electromagnetic effects used in the simple dc motor. 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. Scroll down the page for lessons and examples for the following topics. By understanding how a motor works you can learn a lot about magnets.
A second wire wire 2 connects the positive terminal of the second battery with the axle support to create a closed loop. An electric current in a conductor produces a magnetic field. Electric motors, generators, alternators and loudspeakers are explained using animations and schematics. The catapult effect motor effect is used to make a simple electric motor spin round. An electric motor is a rotating device, which is made to convert electrical energy into mechanical energy. In a motor, the wire is wound around a central block called an armature. Electromagnetic induction electromagnets and motors gcse. It supplies power to the motor armature or field coils. Resistors in circuits summary the physics hypertextbook. Provide learners with a blank sheet of a motor and get learners to explain what is happening as the coils rotate between both magnets. The answers at the end of the powerpoint refer to the summary questions in the aqa gcse physics book, page 221.
This force the electric wire experiences is called the motor effect and only happens when the wire is carrying electricity. Student book edexcel international gcse 91 physics develop your practical skills with investigative tasks check your progress and understanding using the end of the topic checklists and. The magnetic field helps to produce a torque on the rotating armature coil by the virtue of flemings lefthand rule. An electrician repairs an electric motor onboard an aircraft carrier. As current passes around the loop of wire, one side will experience a force pushing it upwards. Electric motor parts of motor, working of electric motor. In your house, almost every mechanical movement that you see around you is caused by an ac alternating current or dc direct current electric motor. P15 homework booklet 214 229 use gcse physics book pages.
Diagram of a simple dc motor, showing the repulsion between the poles. The model used is a simple model which you can do as a class activity or a class demo by. The starter for the lesson revisits models as a way of helping to explain principles of electric circuits. When teaching motors and dynamos a simple class practical of making an electric motor can be undertaken practical can be found on nuffield foundation website. Gcse sciencethe motor effect wikibooks, open books for. If the magnetic field from the wire is placed in another magnetic field, they interact, causing the wire to move. Oct 12, 2014 theory our next task was to think about the physics involved in the invention and application of the electric motor. For gcse physics coursework and exams, and students, parents and teachers. 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. Alevel physics advancing physicsmotors wikibooks, open. The frequency of the wooden bar is 2 hz and produces waves with a wavelength of 0. An electrical motor is a device that converts electrical energy to mechanical energy.
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