handin04 - Physics 212 Classical and Modern Physics Spring...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

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

Unformatted text preview: Physics 212 Classical and Modern Physics Spring 2008 Solutions for Hand-In Set #4 Wolfson Chapter 26-42b Amperes Law tells us H ~ B d~ r = I enc . We choose the Amperian loop to be a circle around the wire, right at the surface. This loop has a radius of 0 . 5 10- 3 m. The ~ B-field has a constant magnitude, by symmetry. The RHR also says the ~ B-field points directly along the loop, by symmetry. So I ~ B d~ r = B (2 r ) = I since all the current I flows through this loop. Solve for B : B = I 2 r = (4 10- 7 )(5) 2 (0 . 5 10- 3 ) = 2 . 10- 3 T . Wolfson Chapter 26-44 For a solenoid, B sol = nI , where n is the number of turns per unit length along the solenoid axis. This gives B sol = (4 10- 7 )(3300)(4 . 1 10 3 ) = 17 T. Wolfson Chapter 26-66 P 1 P 2 R We have cylindrical symmetry, and the magnetic field must be circular around the center of the tube....
View Full Document

This homework help was uploaded on 04/11/2008 for the course PHYS 212 taught by Professor Ladd during the Spring '08 term at Bucknell.

Page1 / 2

handin04 - Physics 212 Classical and Modern Physics Spring...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online