ON THE ELECTRODYNAMICS OF MOVING BODIES By A. EINSTEIN June 30‚ 1905 It is known that Maxwell’s electrodynamics—as usually understood at the present time—when applied to moving bodies‚ leads to asymmetries which do not appear to be inherent in the phenomena. Take‚ for example‚ the reciprocal electrodynamic action of a magnet and a conductor. The observable phenomenon here depends only on the relative motion of the conductor and the magnet‚ whereas the customary view draws a sharp distinction
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wireless use of electromagnetic fields to transfer data‚ for the purposes of automatically identifying and tracking tags attached to objects. The tags contain electronically stored information. Some tags are powered by electromagnetic induction from magnetic fields produced near the reader. Some types collect energy from the interrogating radio waves and act as a passive transponder. Other types have a local power source such as a battery and may operate at hundreds of meters from the reader. RFID systems
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The Nobel Prize in Physics 2010 was awarded jointly to: Andre Geim and Konstantin Novoselov (University of Manchester) "for groundbreaking experiments regarding the twodimensional material graphene" The rise of graphene A.K. Geim and K.S. Novoselov Nature Materials‚ vol. 6‚ March 2007 Presented by Angela Intermite Journal Club presentation 18/10/2010 Overview • Definition of graphene • History of a material that should not exist • Experimental evidence • Electronic structure • Electronic
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Build an Electromagnet To find out how electromagnetism works by constructing an electromagnet and be able to answer the question “How does electromagnetism work?” Build an Inclinometer To build a device that will trace the lines of the Earth’s magnetic field.
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1. Why is an iron core needed in an electromagnet? 2. How are electromagnets different to either temporary or permanent magnets? 3. What happens when you add more coils to the wire in an electromagnet? What else can you do to increase the magnetic field of an electromagnet? Electromagnet Simulation http://www.fossweb.com/modules3-6/MagnetismandElectricity/activities/electromagnet.html This is an interactive simulation of an electromagnet. Your goal is to test the different factors that
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60’s saw a huge surge in technological advances‚ from the first halogen lamp being invented in 1960 to the invention of the ATM in 1969. The music industry also saw the benefit of these advancements. During the 50’s‚ studios started recording on magnetic tape. 1963 saw the invention of compact cassette tapes‚ created and produced by Phillips. They were perfect for music distribution as they were small and easy to transport. They were also reversible which meant more could be recorded onto them.
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3. That includes diagrams of the entire instrument with labels showing all dimensions‚ a list of all major components required‚ details of all major electrical components including the voltages and currents required‚ details of the electric and magnetic fields utilised and of any subsystems used to generate those fields. Section 4 contains example calculations demonstrating the operation of the device for two different atomic species. Intermediate results are given at key points in the calculations
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MTN Learn Physical Sciences Grade 12 radio support notes MINDSET LEARN XTRA GRADE 12 PHYSICAL SCIENCES RADIO BROADCAST NOTES CONTENTS Introduction ................................................................................................................ 3 Broadcast Schedules ................................................................................................ 5 Preparing for Examinations ..................................................................................
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Anti Collision Pad for Vehicles Objective: To be able to use the concept of electromagnetic repulsion in avoiding road accidents. Problem: Is electromagnetic force of repulsion enough to avoid impacts.? Introduction: Maglev Train‚ a train that uses the repulsion of like charges within its railings in order for it to levitate and move‚ was the inspiration of this project. The team thought of some ways to use the concept and build something useful. Until‚ the group thought of some serious road
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TLE Electron The electron (symbol: e−) is a subatomic particle with a negative elementary electric charge. An electron has no known components or substructure. It is generally thought to be an elementary particle.[2] An electron has a mass that is approximately 1/1836 that of the proton. The intrinsic angular momentum (spin) of the electron is a half-integer value in units of ħ‚ which means that it is a fermion. The antiparticle of the electron is called the positron; it is identical to the
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