{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Lecture 29a

# Lecture 29a - Chapter 29 Magnetic Fields due to currents A...

This preview shows pages 1–7. Sign up to view the full content.

Chapter 29 Magnetic Fields due to currents

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

View Full Document
A compass needle always points in the direction of the local magnetic field. If we put a compass near a current-carrying wire, it will A. Not be affected B. Point parallel to the wire C. Point perpendicular to the wire D. Point toward the wire E. Other demo
B Field due to a long straight current-carrying wire

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

View Full Document
Calculating B-field due to a current: Biot-Savart law is the permeability constant 2 0 ˆ 4 r r L d i B d dB i dL dL is a short length of wire carrying current i 𝜇 0 = 4𝜋 × 10 − 7 T ∙ ?/𝐴 For a long wire 2 0 ˆ 4 r r L d i B d B tot
5 Calculate Magnetic Field from an infinite straight wire. R r dz i z direction q B=? 2 0 ˆ 4 r r L d i B d page) the into ( sin 4 2 0 q r dz i B d 2 2 2 R z r r R / sin q Now a little geometry z=0

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

View Full Document
6 R r dz i z direction q B=?
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern