This means that magnetic field lines unlike electric

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This means that magnetic field lines (unlike electric field lines) formed an endless loop. If a particle were to follow a magnetic field line it would eventually come back to the same location.
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History of Magnets Many similarities between magnetism (MG) and electrostatics (ES) were found: (ES): Two types of charges, + and –. (MG): Two types of poles (north and south). (ES): Like charges repel, opposite charges attract. (MG): Like poles repel, opposite poles attract. (ES): Can move objects at a distance. (MG): Can also move objects at a distance.
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History of Magnets There are also many differences between magnetism (MG) and electrostatics (ES): (ES): Can separate a + away from a –. (MG): Can’t isolate a north pole from a south pole. (ES): Field lines always start on + and end on -. (MG): Field lines have no end; endless loops. N S N N S S N N S S
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History of Magnets In 1820, it was discovered that electric current produced a magnetic field. That led to an interesting question: What did moving electrical charges have to do with rocks in Magnesia? Everything as it turns out, since all magnetism is fundamentally caused by moving charges.
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For Next Time (FNT) Keep reading Chapter 28 Start working on the homework for Chapter 28
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