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Electromagnetic Induction
- 2. Electromagnetic Induction Created electromotiveforce from interaction with magnetic field
- 3. Magnet Induces Current Voltageis induced when a magnet moves towards or away from a coil, inducing a current in the coil. Faster the magnet’s motion, the greater the induced current.
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- 5. Electric generator movesa conductor in a magnetic field to produce voltage via electromagnetic induction Electric Generator Mechanical energy Electrical energy
- 6. Electric Motor Current inCurrentin Can create an electrical motor by passing a current through a set of electro-magnets mounted on a rotating shaft. Electrical energy Mechanical energy
- 7. Induction: No FreeLunch Takes work to turn the generator crank to produce electric current. The faster we turn the crank to produce more current, the more difficult it is to turn More difficult to push the magnet into a coil with more loops because the magnetic field of each current loop resists the motion of the magnet.
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- 9. Magnetic Recording Write databy magnetizing recording media (e.g., video tape, hard disk) using electromagnets. Data is read back using the induced current produced when magnetized media moves past receiver coils (reverse of writing data). Hard disk
- 10. Demo: Magnetic Brakes Strongmagnet dropped into a copper pipe falls slowly due to secondary magnetic field induced by its motion. Great America’s Drop Zone has a 22 story freefall, lasting four seconds, decelerated by magnetic braking.
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- 12. Eddy Currents Primary MagneticField Self-Induced Magnetic Field
- 13. Presented by : Md. Shahriyar Hassan ID:171-33-3867 Tirtha Bose ID:171-33-3912 Md. Mehedi Hasan ID:171-33-3809 Shahadat Hossain ID:171-33-3893 Arshed Hossain Fahim ID:171-33-3852
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