caption: Magnetic Field Lines, which are always closed loops.
exif: {"Image DocumentName": "Magnetic Field Lines, which are always closed loops.", "Image ImageDescription": "Magnetic fields can be visualized using. Magnetic Field Lines, which are always closed loops. Figure (a) Visualizing magnetic field lines around a bar magnet, using iron filings and compass needles. The red end of the bar magnet is its north pole. The N pole of a nearby compass needle points away from the north pole of the magnet. (b) Magnetic field lines for a bar magnet.", "Image XResolution": "200", "Image YResolution": "200", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}