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Two point charges Q₁ = +5.20 nC and

Q₂ = −1.60 nC

are separated by 45.0 cm.

Two point charges Q, = +5.20 nC and Q, = -1.60 nC are separated by 45.0 cm.
(a) What is the electric potential at a point midway between the charges?
(b) What is the potential energy of the pair of charges?
What is the significance of the algebraic sign of your answer?
O Positive work must be done to separate the charges.
O Negative work must be done to separate the charges.

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This is a simple application of Coulomb law and energy theorem. Where the last question was the most important one.

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