Here the principles of fuses and earthing are studied. To be able to understand the dangers of electricity without fuses to be able. Im all for going barefoot whenever possible, outdoors. Free revision guides, questions banks and resources. Atom all substances are made of tiny particles called atoms. Feb 05, 2015 cables and plugs gcse aqa to be able to understand the dangers of electricity without fuses to be able to increase our knowledge on live, neutral and earth wires 6. Ks2 science science biology teaching science life science science posters education posters science books science fair gcse biology revision anatomical charts for children body organs the body organs poster support visual learning and are a great way of brightening up any room or classroom. If the current is too high the circuit breaker switches to off, breaking the flow of current. Power is a measure of how quickly energy is transferred and its measured in watts. Then, well learn about forces, momentum, energy, and other concepts in lots of different physical situations.
The exam bored is ocr however it fits in others as well. Gcse physics revision guide with online edition ag cour parsons, richardm on. Fuses fuses help protect the circuit against faults. Aug 23, 2018 i opened a subscribers gcse results 2018 not a levels. The difference between atoms, elements, compounds, mixtures and ions always confuses students. A fuse works by melting and breaking a circuit if the current gets too big. Need for earthing and double insulation mini physics.
A circuit breaker is composed of a springloaded push switch, a springloaded soft iron bolt and an electromagnet. Read aqa gcse 91 physics student book by nick england available from rakuten kobo. Gcse sciencesafety in mains circuits wikibooks, open books. A fuse is an electrical wire which is thick enough to allow the required current for the device to pass through it, but thin enough to melt and break the circuit if too much current flows. Sometimes a live wire may come in contact with a metal casing of a device this will not cause a fuse. Wave speed, frequency, wavelength, period vfw gcse physics combined science equation worksheet.
Slightly higher than the normal working current of the appliance, but if it is much higher it will not melt soon enough. Need help with gcse biology, pe or spanish revision. Atoms have a small central nucleus, which is made up of protons and neutrons and around which there are electrons. Free physics books download ebooks online textbooks. Be aware that theres a substantial commercial aspect to earthing. Fuses physics of conductors and insulators electronics. Discover millions of flashcard sets created by other students and teachers or easily create your own to personalise your revision. Nov, 2011 this website and its content is subject to our terms and conditions.
The earth wire and the fuse together reduce the risk of an electric shock from an appliance with a metal case and also protect the wiring of the circuit from overheating and possibly causing a fire. The students look in a data book and find that the speed of sound in air is given as 341 ms. The hairdryer has a plastic case so there is no need for an earth wire connection in the plug. Sometimes a live wire may come in contact with a metal casing of a device this will not cause a fuse to blow. Gcse physics electrostatic charge how can fuels or. Tes global ltd is registered in england company no 02017289 with its registered office at 26 red lion square london wc1r 4hq. Science revision gcse science science notes physical science science education music education education posters physics lessons gcse physics from our science poster range, the amplitude and pitch poster is a great educational resource that helps improve understanding and reinforce learning. Fuses have different colours for different ratings. Calculating power and fuses gcse physics doodle science. Chart and diagram slides for powerpoint beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects. The demo mentioned in the ppt is the one that shows risks of fire linked to too much electrical current going through wire using power supply, crocodile clips, heat proof mat, safety screen, 20 cm length of thin constantan wire and variable resistor. Live, neutral, earth, plugs, fuses and circuit breakers. Domestic electricity explores electrical circuits and the safety devices around the home, like fuses and circuit breakers, the ring main circuit and the functions of the live, neutral and earth wires.
An earth wire is a good conductor and connects the neutral wire in the fuse box and the individual power outlets in the house to the earth. Activate is the most popular course for ks3 science and provides ideal preparation for all gcse routes, with comprehensive and flexible assessment and progression. The video lesson includes the structure of wires and cables, fuses and earthing, ac and dc supply and the function of a residual current circuit breaker. One type of circuit breaker used instead of a fuse and earth wire is. A plug connects a device to the mains electricity supply. Circuit breakers are also used to protect appliances and electrical circuits.
Fuses are always connected in series with the components to be protected from overcurrent, so that when the fuse blows opens. A large current flows to earth and melts the fuse, disconnecting the supply. The case is made of plastic an insulator for safety. Earthing, or grounding, is a revolutionary method of balancing oneself by reconnecting with the earths electrical potential. Cartridge type fuses are popular in automotive applications, and in industrial applications when constructed with sheath materials other than glass. Doubleinsulated appliance such as hair dryers are marked. The earth wire is green and yellow and is a safety device designed to protect people from shocks. P4 p5 p6 exam revision physics p4 p5 p6 a condesed. Earthing is a must read for anyone interested in optimal health. Physics section 1 fuses and circuit breakers flashcards. How can powder flowing through a pipe cause an explosion.
Mains electricity gcse aqa to know what is meant by direct current and alternating current. Earthing or an earth wire is fitted in order to protect people from an electric shock from electrical appliances. Dec 26, 2015 mini physics is a participant in the amazon services llc associates program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon. The current limit through the fuse fuse rating can be controlled by varying the thickness of the tincoated copper wire. Electrical energy is current multiplied by voltage and time. Cambridge igcse computer science coursebook pdf free. Safety is a major requirement when electricity is used in a medical situation. Explain what a rccb is and evaluate its use compared to a fuse. In addition, a cable can connect the pipe to the fuel tank, so that there can be no difference in charge between them. The fuse is a device that melts and breaks the circuit when the current gets too high. Fuses are used to protect the flexible lead between the plug and the appliance. Gcse science p4 radiation for life revision list maths made.
Aug 21, 20 this website and its content is subject to our terms and conditions. Gcse astronomy edexcel workbooks teaching resources. From the research that you have done, describe in detail. Gcse physics thermal physics 3 convection, conduction and radiation a gcse revision video to help you learn about heat transfer. Gcse physics revision guide with online edition ag. The electrical earthing is done by connecting the noncurrent carrying part of the equipment or neutral of supply system to the ground.
Edexcel international gcse 2009 in physics 4ph0 and. In domestic devices, energy is transferred from the batteries or ac mains to the energy of the motors and heating devices. Aqa has provided a comprehensive guide to isas in science, including the mark scheme for the commonly asked questions, such as. Dont wait for a health condition to pick up this book but if you are in a health predicament, spend as much time as possible on your bare feet connecting to the healing power of the earth. Earthing prevents electric shocks from metal objects.
Activebook a digital copy of the student book in the back of every copy. See more ideas about physics, igcse physics and physical science. Youll find loads of teaching videos, revision videos, practical videos, exam practice videos, and more here. Earthing and double insulation electrical safety gcse physics. Written by expert teachers for the cie igcse 91 0972 ag 0625. Gcse sciencesafety in mains circuits wikibooks, open. Tes global ltd is registered in england company no 02017289 with its registered office. Our office has incomer feeder of 11 kv with sanctioned load of 600 kw in delhi.
Contains a punctuation exercise, and i printed the wikipedia article on circuit breakers to go with it. What other answers havent mentioned is earthing or protectiveearth wiring pe. All information was taken directly from the aqa revision guide with only the key points from p2 5. Household electricity mains electricity edexcel gcse. Components of electrical earthing system earth continuity conductor or earth wire. Isaac physics a project designed to offer support and activities in physics problem solving to teachers and students from gcse level through to university. Aug 29, 2001 the fourth edition of this comprehensive gcse physics text has been revised to cover the latest gcse specifications. Insulation, earthing, fuses and circuit breakers help to protect us from electrical injury. This book provides a quick look at the content of unit p2 of the aqa gcse physics course and the additional science course. Start studying physics section 1 fuses and circuit breakers. Learn vocabulary, terms, and more with flashcards, games, and other study tools.
Physics is the study of the basic principles that govern the physical world around us. Gcse 91 physics or combined science revision topic 2 for p1 duration. It offers bolster on hypothetical and down to earth parts of the cambridge international examinations computer science 0478 syllabus, composed by experienced software engineering mentors. The process of transferring the immediate discharge of the electrical energy directly to the earth by the help of the low resistance wire is known as the electrical earthing. What a surge is and how it can cause harm how safety features can protect us from that harm in particular. Anyone touching it would complete a circuit with earth causing a potentially fatal current to. This website and its content is subject to our terms and conditions. Double award student guide provides a complete guide to using the edexcel igcse biology, chemistry and physics student books to teach or study science double award. Edexcel international gcse physics pearson qualifications. A fuse is an electrical safety device built around a conductive strip that is designed to melt and separate in the event of excessive current. Residential wiring used to commonly employ screwin fuses with glass bodies and a thin, narrow metal foil strip in the middle.
The ring main domestic electricity wjec gcse physics. Our new crystalgraphics chart and diagram slides for powerpoint is a collection of over impressively designed datadriven chart and editable diagram s guaranteed to impress any audience. Earth wires and fuses work together in uk mains circuits to keep users safe from. Past papers, exam questions by topic, revision notes, worksheets and solution banks. Some appliances are doubleinsulated this means they have a plastic insulating case and therefore do not require an earth wire connect to them. This is a 9 page document on the physics modules 4, 5 and 6. Learn about using electricity safely using insulation, fuses and potential hazards with bbc bitesize gcse physics. A helpful revision guide providing a detailed look at circuit breakers and earthing, such as residual current circuit breakers, for gcse physics.
Demonstrating earth connections and fuses working together. Gcse sciencesafety in mains circuits wikibooks, open books for. Edexcel level1level 2 certificate in physics kph0 the number of guided learning hours required for this qualification is 120140, which equates to approximately 2 hours per week over 60 weeks and reflects how centres will use time for practical activities differently. When you have completed the booklet go to the schools website and find the relevant mark scheme and mark your work. Aqa 2016 gcse physics 8463 specification from september 2016. The pole that points towards north is called a northseeking pole. Household electricity mains electricity and alternating. Gcse physics revision guide with online edition ag cour.
Whatever the subject, quizlets flashcards have your back. An earthing strap connects the pipe to the ground the earth. Since the earth is so big, it can absorbegive a practically infinite amount of charge without changing potential, this means that you can treat earth as a reservoir of ready to use electrons. One website that i visited sells a range of equipment, including earthing beds said to do what no other mattress on the planet canreconnect you to the earths gentle, natural healing energy while you sleep.
Mains electricity uses earthing as a safety measure. This 9 page document is a condensed version of a revision guide, however it only contains key points and notes necessary for the exam. Doodle science teaches you high school physics in a less boring way in almost no time. In module 4 there is static electricity, dust precipitators, defibrillators, plugs, fuses, earthing, resistance, sound, radioactivity.
Read all about the earths natural healing potential to alleviate their aches and pains, inflammation, sleep disorders and free radical damage in this ground breaking book. Electrical safety devices electrical energy in the home. The practical involved blowing glass 1a fuses, using standard lab equipments you will want to practise it before the lesson. A fuse is an electrical component which is placed in an electrical circuit for protection against electrical faults such as a current surge. Physics gcse science revision electricity the role of the earth wire is. Aug 21, 2016 need for earthing and double insulation wiring a mains plug earthing is the act of connecting the metal casing of the appliance to earth via a wired connection to the bare ground.
However if it is not higher than the normal current it will melt as soon as the appliance is switched on. Its more convenient than a fuse because you can simply switch it back on. Fuses are overcurrent protection a 10a fuse might help prevent a fire, since it limits the power that an appliance can receive. A 3 amp fuse is red, a 5 amp fuse is black or very dark blue, a amp fuse is brown. Student books full colour textbooks matched to the specification. Fuse and circuit breakers mini physics learn physics. A fuse provides a builtin failsafe to the electrical circuit for a device. Home gorillaphysics gcse and a level physics revision. Gcse physics static and current electricity register free.
Aqa gcse sciences student book answers separate sciences download answers to the practice and summary questions in your aqa gcse sciences 91 biology, chemistry and physics student books. Connecting the fuse or circuit breaker to the neutral wire is incorrect, i. The text is accompanied by a good selection of fullcolour illustrations and photographs. Mar 09, 2014 doodle science teaches you high school physics in a less boring way in almost no time. The powerpoint and worksheet are part of the lesson to explain power rating of an appliance and the fuse used. Household electricity mains electricity edexcel gcse physics. Describe two differences between the orbit of the comet and the orbit of the earth. Fuses these are important safety devices which blow if the current exceeds the rating of the individual fuse. The charges might be built up by friction between the fuel and the. Search the worlds most comprehensive index of fulltext books. The inside of a plug showing the positioning of the earth, neutral and live wires. What other answers havent mentioned is earthing or protective earth wiring pe. A photograph showing both types of fuses is shown here. The book gives a quite complete and uptodate picture of the standard theory with an historical perspective, with a collection of articles written by some of the protagonists of present particle physics.
All the specification points are covered in simple bulletpoint form. Aqa gcse sciences student book answers separate sciences. If the outer casing the outside bit of an appliance is made of metal a good conductor then it can be made safe by earthing. Nov 27, 2011 what is the minimum frequency of earthpit maintenence as per indian standards in a lv installation like for example in petrol pumps etc. A large curent flows to the earth and melts the fuse, disconnecting the supply.
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