Magnetic force  The magnetic force can be demonstrated using two bar magnets, which are metallic bars that have north and south poles:  From a) and
{"Image DocumentName": "Topic 5: Electricity and magnetism 5", "Image ImageDescription": "Topic 5: Electricity and magnetism 5.4 \u2013 Magnetic effects of electric currents. Magnetic field. \uf0b7Because of their historical use for navigation, magnetic poles of detection devices are defined like this: \uf0b7The pole labeled North is really the north-seeking pole. \uf0b7The pole labeled South is really the south-seeking pole. \u00a9 2014 By Timothy K. Lund. N. S. From the pole law we see that the north geographic pole is actually a south magnetic pole!", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}