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Electric field line

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dL

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dA

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dV

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sigma = Q/A
dq=sigma(d)(

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uniformly distributed q

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Euphoria

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Positive and negative

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NC^-1

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Electric Fields

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The principle ofsuperposition

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- same sign ( attractive force )
- opposite sign ( repulsive force )
- obeys Newton's third law

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Newton/Coulomb

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Electric Force, F e

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charged particle exerts on each other

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Induction and contact

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Conductor

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positive and negative

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Coulomb (Q)

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Static Charge

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1.60 *10^-16

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1) the electromagnetic force acts on charges
2) electric charge is quantized
3) electric charge is conserved

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Electric charge, q

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Direction of electric field and electric force are same when it positive