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| quote: | Originally posted by DR86
i already have coulomb's law, and all that other stuff. what i want to know is that are lines of force just what you're drawing when you draw the field diagrams? |
Field lines are a way to visualize force. They are IMAGINARY, i.e. they do not exist (as far as we know). They are a concept to help people understand the electromagnetic force. For the electromagnetic force, field lines exit positive charge and enter negative charge. Their density is related to the strength, i.e. the closer the lines, the stronger the field -> more force. Therefore, the force close to a source or sink is greater than far away. Field lines always have a source and a sink.
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