I have a few questions about electromagnetism that no matter how many texts i read i can't seem to figure out, so i'll cut to the chase.(adsbygoogle = window.adsbygoogle || []).push({});

1) why is current in the opposite direction of the flow of electrons? Shouldn't it be in the same direction as the electrons are travelling?

2) How does a current create a magnetic field? I know that 2 charged objects exert a force on each other so I understand how electrical forces work.. what is the difference between an electric field and a magnetic field?

3) If i'm looking at a map of an electric field.. does the tangent of a point on a field line represent the force exerted on a charge at that point? If so how can you ever know the direction a charge will travel if you have to constantly re-evaluate its acceleration? also do the lines represent equal potential energy of the charge.. so does a charge at any point on the same field line have the same amount of potential energy?

also why does electrical field obey an inverse square law to the radius, and a volt is inversely proportional to the radius. i know E = V/r so the math works out but i have trouble visualizing what this means. thanks for the help

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# Some q's about electromagnetism

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