Question: Two point charges with q1 = +3.5 10 7 C and q2 = 4.5 10 7 C are initially separated by a distance of r

 Two point charges with q1 = +3.5  107 C and q2 = 4.5  107 C are initially separated by a distance of r = 2.5  104 m. 

  •  How much energy is required to double their separation and what is the electric potential at the point midway between the two charges when their separation is 2r?

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