P30_019 - 2 πx = µ idx 2 πxw Thus B P = Z d B P = µ i 2...

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

View Full Document Right Arrow Icon
19. Consider a section of the ribbon of thickness dx located a distance x away from point P . The current it carries is di = idx/w , and its contribution to B P is dB P = µ 0 di
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 2 πx = µ idx 2 πxw . Thus, B P = Z d B P = µ i 2 πw Z d + w d dx x = µ i 2 πw ln ³ 1 + w d ´ , and ~ B P points upward....
View Full Document

Ask a homework question - tutors are online