ch22-p030 - 30. (a) It is clear from symmetry (also from...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
30. (a) It is clear from symmetry (also from Eq. 22-16) that the field vanishes at the center. (b) The result ( E = 0) for points infinitely far away can be reasoned directly from Eq. 22- 16 (it goes as 1/ z ² as z ) or by recalling the starting point of its derivation (Eq. 22-11, which makes it clearer that the field strength decreases as 1/ r ² at distant points).
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.
Ask a homework question - tutors are online