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Electrostatics and electric fields

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State Coulomb's law

Two point charges in free space or air exert forces on each other. The force is directly proportional to the product of the charges and inversely proportional to the square of the distance between the charges

When is an object negatively charged?

An object with an excess of electrons is negatively charged

The formula for change is the charge

Q (change) = Q(f) - Q(i)

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