NTNUJAVA Virtual Physics Laboratory
Enjoy the fun of physics with simulations!
Backup site http://enjoy.phy.ntnu.edu.tw/ntnujava/

Easy Java Simulations (2001- ) => electromagnetism => Topic started by: ahmedelshfie on May 25, 2010, 02:47:06 am

Title: MagnetNcoil
Post by: ahmedelshfie on May 25, 2010, 02:47:06 am
This following applet is MagnetNcoil
Created by prof Hwang Modified by Ahmed
Original project MagnetNcoil (http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=1449.0)

The following applet show interaction force between a circular current loop in magnetic field generated by a magnet.
You can change the location of magnet with two sliders (move in y/z direction).
The radius R of the current loop can be changed with slider,too.
Click play to trace out the magnetic field lines (produced by magnet).

Title: Re: MagnetNcoil
Post by: ahmedelshfie on July 04, 2010, 11:25:14 pm
An electromagnetic coil (or simply a "coil") is formed when a conductor (usually an insulated solid copper wire) is wound around a core or form to create an inductor  or electromagnet. One loop of wire is usually referred to as a turn, and a coil consists of one or more turns. For use in an electronic circuit, electrical connection terminals called taps are often connected to a coil. Coils are often coated with varnish and/or wrapped with insulating tape to provide additional insulation and secure them in place. A completed coil assembly with taps etc. is often called a winding. A transformer  is an electromagnetic device that has a primary winding and a secondary winding that transfers energy from one electrical circuit to another by magnetic coupling without moving parts. The term tickler coil usually refers to a third coil placed in relation to a primary coil and secondary coil. A coil tap  is a wiring feature found on some electrical transformers, inductors and coil pickups, all of which are sets of wire coils. The coil tap(s) are points in a wire coil where a conductive patch has been exposed (usually on a loop of wire that extends out of the main coil body). As self induction is larger for larger coil diameter the current in a thick wire tries to flow on the inside. The ideal use of copper is achieved by foils. Sometimes this means that a spiral is a better alternative. Multilayer coils have the problem of interlayer capacitance, so when multiple layers are needed the shape needs to be radically changed to a short coil with many layers so that the voltage between consecutive layers is smaller (making them more spiral like).