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Charles Coulomb - toward another charge(attractive or...

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Charles Coulomb’s Law (Law of Electrostatics, 1785): 0 = 8.85 10 - C 2 N -1 m -2 is the electric permittivity constant Note that electric charge q can be positive or negative. The force is either attractive (opposite charges) or repulsive (like-sign charges). So the direction of the force is either
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Unformatted text preview: toward another charge (attractive) or oppositely directed from another charge (repulsive). That is, the force is always aligned along 12 ˆ r . Use this guidance in determining the direction of a force along a particular axis, not the sign of 1 2 q ⋅ q directly...
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