February 24, 2017

Homework Help: Physics

Posted by David D. on Friday, September 3, 2010 at 6:18pm.

Two 10 cm diameter charged rings face each other, 20 cm apart. The left ring is charged to -20 nC and the right ring is charged to +20 nC.

What is the force on a 1.2 nC charge placed at the midpoint?

I have already calculated the electric field between the two rings to be 25723.87 N/C to the left. However, I don't know how to use the rings as point charges to solve the second problem.

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