Another Way to Visualize E ...

• The “Good Old” Way: Vector Maps

• Lines leave (+) charges; return to (-) charges (charges = sources)

• Number of lines leaving/entering charge ? amount of charge

• Tangent of line = direction of E

• Local density of lines ? local magnitude of E

• field at two white dots: differ by factor of 4, since r differs by 2

• local density of field lines differs by 4 as well

• A New Way: Continuous Electric Field Lines

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