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Measuring Electrostatic Potential Energy

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Two particles with charges q1 and q2 are separated by distance d. Rank these scenarios according to the magnitude of the electrostatic (coulombic) potential energy. Ignore sign.

Scenario 1:
q1 = +4
q2 = -4
d = 4 A

Scenario 2:
q1 = +1
q2 = -1
d = 1 A

Scenario 3:
q1 = +1
q2 = -1
d = 3 A

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The expert measures electrostatic potential energy.

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Electrostatic potential energy (between 2 charges) is proportional to the quantity of q1*q2/d where d is the separation.

Scenario 1 we get a ...

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