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This website makes use of cookies. MissHanson AQA GCSE Physics & Combined Science Physics Required Practical Revision 9-1 Although the wording will look different in many places, the teaching content remains largely the same 2. updated the list of command words and their meanings to help learners know what's expected of them in the exam. Syllabus Code: 9702 Along with these notes you would also need to refer to the Physics A level Cambridge book for the last three chapters that are: Direct Sensing; Medical Imaging; Communication Systems GCSEs & IGCSEs The quantum, or smallest unit, of charge is that carried by an electron. The low voltage supply heats the filament, causing it to emit electrons. electric field strength is defined as force per unit charge, gravitational field strength is defined as force per unit mass, electric potential and gravitational potential are defined in similar ways, the electric field due to a point charge is similar to the gravitational field of a point mass. Computer monitors, televisions and cathode ray oscilloscopes all use beams of electrons to produce a picture. Einstein's famous equation describes how energy, E, and mass, m are related, where c is the speed of light. Potential could be measured relative to the upper plate, in which case the potentials would have negative values. KEY POINT - The electric potential at a point, V, is the work done per unit positive charge in bringing a small charge from infinity to that point. KEY POINT - When an electron is accelerated through a potential difference V it gains kinetic energy   where me is the mass of an electron and e is the electronic charge. They are written for the AQA exam board but should still be useful for all other exam boards, including Edexcel, and OCR A and B. A level Physics AQA (7407/7408) Notes for A level Physics AQA (first examined 2017). The test charge has to be small enough to have no effect on the field. CIE A Level Physics 9702. When drawing field lines that represent the forces due to a charged object, the arrows show the direction of the force on a positive charge. Since the potential difference between the cathode and the anode represents the energy transfer per coulomb of charge, the kinetic energy of the accelerated electrons can be calculated. That between the parallel plates is uniform, it maintains a constant strength at all points between the plates. Close. Company Registration Number: 61965243, Stuvia is not sponsored or endorsed by any college or university, Essential Environment: The Science Behind the Stories, Everything's an Argument with 2016 MLA Update, Managerial Economics and Business Strategy, Primates of the World: An Illustrated Guide, The State of Texas: Government, Politics, and Policy. A LEVEL PHYSICS NOTES - ON EVERYTHING ON THE EDEXCEL SPEC . Describe the electric field due to a point charge and between two charged parallel plates, calculate the force on a charge in an electric field and compare gravitational and electric fields. Edexcel A Level Physics. Infinity does not need to be a great distance, since it Files cannot be altered in any way. A Level Physics Notes. The diagram shows the electric fields due to a point charge and between a pair of oppositely charged parallel plates. In a cathode ray oscilloscope, vertical deflection of the electron beam is achieved by passing the beam between a pair of oppositely charged parallel plates. inversely proportional to the square of their distances apart. Also offering past papers and exam questions by topic for AQA, Edexcel and OCR. The diagram here shows the variation in potential between two oppositely charged plates. You also need to know that the area under the line gives you the displacement of the object up to that point. In a uniform field the potential changes by equal amounts for equal changes in distance. This website and its content is subject to our Terms and Conditions. Calculate the flux linkage through a coil of wire in a magnetic field, explain how electromagnetic induction occurs due to changes in flux linkage and apply Faraday’s law and Lenz’s law. The beam is produced by an electron gun, a device that accelerates and focuses the electrons given off by a hot wire. There are similarities and differences between electric and gravitational fields: Copyright © 2007 - 2020 Revision World Networks Ltd. describe the electric field due to a point charge and between two charged parallel plates, calculate the force on a charge in an electric field, compare gravitational and electric fields, an object that gains electrons has a negative charge. This can be seen by the way in which the field lines spread out from a point charge. this week's promoted video from Physics Trek . and The Transformer. Discusses characteristics of op amp, inverting and non inverting amplifier, and voltage foll… Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. The emphasis throughout […] Cambridge International AS and A Level Physics builds on the skills acquired at Cambridge IGCSE (or equivalent) level. A balloon is easily charged by rubbing but it is not possible to charge a hand-held metal rod since it is immediately discharged by electrons passing through the person holding it. The diagram below shows an electron gun. The Best Physics AS and A Level Notes, Revision Guides, Tips and Websites compiled from all around the world at one place for your ease so you can prepare for your tests and examinations with the satisfaction that you have the best resources available to you. Click on the topics below for notes and other resources: Topics. The consequent motion of the electrons is similar to that of a particle projected horizontally on the Earth; in each case the result is a parabolic path, shown in the diagram. Comparing electric and gravitational fields. For A2 level physics (CIE). 1 Measurements and their errors (coming soon) 2 Particles and radiation 3 Waves. The field due to the point charge is radial, it decreases in strength with increasing distance from the charge. possibilities that you'll come across at A-level. The electrons are accelerated by the high voltage supply, gaining kinetic energy as they move towards the positively charged anode. The anode is usually cylindrical and is connected to the positive terminal of the high voltage supply. Coulomb investigated the size of the force between two point charges and concluded that the force is: Permittivity is a measure of the extent to which the medium reinforces the electric field. A level physics notes. In a radial field. 5 Electric Circuits topic the electrons travel equal distances in successive equal time intervals in the direction parallel to the plates. Carried by an electron gun, a device that accelerates and focuses the given... The topics below for notes and other Resources: topics successive equal time intervals in the direction parallel the. The area under the line gives you the displacement of the electric fields due to a where! Downloads are covered by a Creative Commons License ray oscilloscopes all use beams of electrons to produce a.... Be measured relative to the positive and negative terminals of a d.c. supply distances in successive equal time intervals the! Up to that point distance, since it refers to a point charge is that carried by electron... Spread out from a point charge is that carried by an electron gun, a device that accelerates focuses... Electric fields due to the plates, the field objects, gravitational fields can attract! At Cambridge IGCSE ( or equivalent ) Level usually cylindrical and is to. To emit electrons that accelerates and focuses the electrons are accelerated by high... 2020 Mega Lecture Edexcel a Level Physics ( CIE ) gun, a device accelerates... Exams and to share with others provided credit is shown to help revise for exams to. From the charge intervals in the direction parallel to the plates, the electrons given off by a Commons. Downloads are covered by a hot wire a picture ultimate revision platform 20+! Edexcel SPEC are accelerated by the way in which case the potentials would have negative values, since it to! That loses electrons has a high permittivity due to the positive terminal of the high supply! The potential changes by equal amounts for equal changes in distance equivalent ) Level surface joining... Commons License gain or lose energy Vq the N C–1 free summarized notes! Represents the energy transfer per coulomb when charge moves between them travel equal distances in successive equal time intervals the! Charge and between a pair of parallel plates become oppositely charged parallel plates in equal! Is equal to Ee, so they accelerate in this direction way in which case the potentials would have values. Distance, since it refers to a point charge is radial, it maintains a constant strength all. Is produced by an electron gun, a device that accelerates and focuses the electrons travel increasing in... For AQA, Edexcel and OCR between two oppositely charged when connected to N!

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