Post a New Question


posted by .

A charge of -2q is placed a distance r from the origin and a charge of +2q is placed a distance 2r from the origin. What is the amount of work needed to move a charge of q to the origin from infinity?

I don't get the question. And please explain to me how can I do it.

  • physics -

    What is the potential energy of the charge q at the origin?

    PotentialV=K(-2q)/r + K(2q)/2r=-kq/r

    Work to take to infintity = Vq or
    = -Kqq/r

Answer This Question

First Name
School Subject
Your Answer

Related Questions

More Related Questions

Post a New Question