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- PHY102 Physics II © Dr.Cem Özdoğan
- Magnetic Field Lines (Similar to electric field lines)
- the direction of the tangent to a magnetic field line at any point gives the direction of B at that point
- the spacing of the lines represents the magnitude of B (stronger where the lines are closer together, and conversely).
- The end of a magnet from which the field lines emerge is called the north pole of the magnet; the other end, where field lines enter the magnet, is called the south pole.
- Because a magnet has two poles, it is said to be a magnetic dipole
- The external magnetic effects of a bar magnet are strongest near its ends, where the field lines are most closely spaced.
- Thus, the magnetic field of the bar magnet collects the iron filings mainly near the two ends of the magnet.
- 28-3 The Definition of Magnetic Field B