![]() ![]() These field lines represent magnetic flux, which is imagined as occupying the space around a magnet and being responsible for the effect of a magnet field. The closer the lines are together, the stronger the field ![]() The relative strength at different points in the field is shown by the separation of the field lines The current view is that these forces can be attributed to ‘exchange particles’. In the days of Faraday and Lenz, they were attributed to the effects of flux. These forces are exerted without any physical link between the magnet or current that causes the field and a magnetic material or current placed within the field. Magnetic field patterns are used to show the forces that are exerted around a magnet or electric current. Like gravitational and electric fields, magnetic fields act at a distance. Although the existence of flux has long been discredited, an awareness of its meaning is useful to understand the laws of induction as set out by Faraday and Lenz.įlux provides a useful model for explaining the effects of magnetic fields. The effects of induction are explained by using the concept of flux. Induction is used to generate electricity in power stations and to transform its voltage as it passes through the distribution system. After studying this section you should be able to:Ĭalculate the flux linkage through a coil of wire in a magnetic fieldĮxplain how electromagnetic induction occurs due to changes in flux linkageĪlmost everything we do, apart from sleeping in the dark, relies on electromagnetic induction. ![]()
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