The electric field on the axis of a uniformly charged ring has magnitude 380 kN/C at a
Chapter 20, Problem 66(choose chapter or problem)
The electric field on the axis of a uniformly charged ring has magnitude 380 kN/C at a point 5.0 cm from the ring center. The magnitude 15 cm from the center is 160 kN/C; in both cases the field points away from the ring. Find (a) the rings radius and (b) its charge. 6
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