P30_077 - 77. For x > 20 mm, the field due i2 is...

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

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 77. For x > 20 mm, the field due i2 is downward and thus subtracts from B1 and is entirely consistent with the given expression for B2 (note that it becomes negative when x > d). Similarly, for x < −20 mm, the field due to i1 is downward and subtracts from B2 (which is positive and points upward for all x < d). This again is consistent with the expression for B1 which is seen to become negative for x less than −d (that is, x negative and |x| > |d|). We conclude that the given expressions are valid over the whole of the x axis, and their answer (Eq. 30-33) holds for all x (other than at the locations of the wires themselves, where it becomes problematic, as discussed in the Sample Problem). ...
View Full Document

This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.

Ask a homework question - tutors are online