Consider a ring of charge.  The ring is in the x-y plane and has a radius of 3.5 m.  The charge per angle as a function of angle α (in radians) around the ring is given by dQ/dα = 6.9 α  (nC/rad). Calculate the z-component of the electric field, in N/C, at the coordinate (0, 0, 9 m).  Use k = 9 x 109 N m2 / C2. (Please answer to the fourth decimal place - i.e 14.3225)

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Consider a ring of charge.  The ring is in the x-y plane and has a radius of 3.5 m.  The charge per angle as a function of angle α (in radians) around the ring is given by

dQ/dα = 6.9 α  (nC/rad).

Calculate the z-component of the electric field, in N/C, at the coordinate (0, 0, 9 m).  Use k = 9 x 109 N m2 / C2.

(Please answer to the fourth decimal place - i.e 14.3225)

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