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A charge of 2.20 µC is uniformly distributed on a ring of radius 9.0 cm. Find...

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Physics

A charge of 2.20 µC is uniformly distributed on a ring of radius9.0 cm. Find the electric field strength on the axis at thefollowing locations. (be careful calculating c and d the last postwas wrong. please include e.)

(a) 1.2 cm from the center of the ring
  N/C

(b) 3.9 cm from the center of the ring
  N/C

(c) 4.0 m from the center of the ring
  N/C

(d) Find the field strength at 4.0 m using the approximation thatthe ring is a point charge at the origin.
  N/C

(e) Compare your results for parts (c) and (d) by finding the ratioof the approximation to the exact result.


(f) Is your approximation result a good one? Explain your answer.(Do this on paper. Your instructor may ask you to turn in yourwork.)

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