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Solenoid
A solenoid is a coil of wire that generates a nearly uniform magnetic field when electric current passes through it. The magnetic field is greatly intensified when an iron core is placed inside the coil. When current flows through the coil, it produces a magnetic field that travels in a doughnut shape around the coil and through its center, and this magnetic field can be used to move or attract the iron core or other ferromagnetic materials.
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Solenoid
- 1. Solenoid Daet, Justine Claire Santiago,Mikaela Hannah 10 - HERTZ
- 2. What is aSolenoid? A long straight coil of wire can be used to generate a nearly uniform magnetic field Many practical applications Iron core greatly intensifies magnetic field (common in electromagnets)
- 3. What are theParts of a Solenoid?
- 4. What to Remember? When thecoil is energized with current, the core moves and the flux linkage is increased. Solenoid is a coil used to generate electromagnetic fields When a current flows through the coil (magnetic field is greatly intensified), it goes around the coil and through its center in a doughnut shape
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Editor's Notes
- #2 http://www.electricaltechnology.org/wp-content/uploads/2014/11/What-is-a-Solenoid-and-Solenoid-Magnetic-Field-.jpg
- #3 They are frequently used in home appliances (e.g. washing machine valves), office equipment (e.g. copy machines), automobiles (e.g. door latches and the starter solenoid), pinball mahines (e.g., plungers and bumpers), and factory automation.
- #4 Here's how it works. When current flows through a wire, a magnetic field is set up around the wire.If we make a coil of many turns of wire, this magnetic field becomes many times stronger, flowing around the coil and through its center in a doughnut shape.When the coil of the solenoid is energized with current, the core moves to increase the flux linkage by closing the air gap between the cores.
- #5 Magnetic flux (most often denoted as Φm), is the number of magnetic field lines (also called "magnetic flux density") passing through a closed surface (such as a conducting coil). The SI unit of magnetic flux is the weber (Wb) (in derived units: volt-seconds). The CGS unit is the maxwell. In this case the flux linkage is simply the flux density passing through the loop multiplied by its surface area, i.e. . If several turns of the wire are made, this becomes where N is the number of turns. In this case, the surface through which the magnetic flux is passing has been increased by a factor of .
- #6 http://lrrpublic.cli.det.nsw.edu.au/lrrSecure/Sites/Web/physics_explorer/physics/lo/induction_03/graphics/IMG_4014.jpg