Machine-translated by Google. Questions are authored in English.
Top

Discussion

Far from a uniformly charged ring along its axis, the field approaches that of

  • A.a dipole, falling as the inverse cube of the distance
  • B.a point charge equal to the total charge of the ring
  • C.an infinite line charge of the same linear density
  • D.an infinite sheet of the same surface density

Answer: B

At distances much greater than the ring radius the structure of the source ceases to matter and only its total charge does, so the field tends to the inverse square form. Every bounded charge distribution with a net charge behaves this way at a distance.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.