The electric field on the axis of a uniformly charged ring, Ask an Expert

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The electric field on the axis of a uniformly charged ring has magnitude 360 kN/C at a point 5.6cm from the ring center. The magnitude 18 cm from the center is 110 kN/C; in both cases the field points away from the ring.

(a) Find the ring's radius.

(b) Find the ring's charge.

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