Maxwell was right!

A charge \(+2q\) moves vertically upwards with speed \(v\), a second charge \(-q\) moves horizontally to the right with the same speed \(v\), and a third charge \(+q\) moves horizontally to the right with the same speed \(v\). The point P is located a perpendicular distance \(a\) away from each charge as shown in figure. What is the magnetic field at point P?

Details and Assumptions

  • \(-\hat{k}\) denotes into the page and \(\hat{k}\) denotes out of the page.

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