Study with the several resources on Docsity
Earn points by helping other students or get them with a premium plan
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
Community
Ask the community for help and clear up your study doubts
Discover the best universities in your country according to Docsity users
Free resources
Download our free guides on studying techniques, anxiety management strategies, and thesis advice from Docsity tutors
You can find here lecture series for complete Electricity and Optics course. All related topics are explained in slides. This lecture slides contain: Current , Gauss’ Law, Ampere's Law, Gauss’ Law for Magnetism, Solenoid, Dipole Moments, Bound Current, Magnetization, Magnetic Susceptibility, Diamagnetic
Typology: Slides
1 / 6
This page cannot be seen from the preview
Don't miss anything!
*Parallel currents attract *Anti-parallel currents repel F = I L × B
2/27/12 4 13.5 V
I 1 + I 2 ~ 500 A
2/27/12 5
Collapse or expansion?
2/27/12 6
Since all lines of B are closed loops, any B line leaving a closed surface MUST reenter it somewhere. TRUE IN GENERAL, not just for this “dipole” example
2/27/12 7
B i d
B dl = 0 2 π r
2 π rB = μ o I B = μ o I 2 π r
2/27/12 13
2/27/12 14
2/27/12 15
current is not continuous B can’t be factored out of the integral. insufficient symmetry finite length current segment
2/27/12 16
2/27/12 17 Net current inside the material is zero. We are left with a surface current and therefore a magnetic moment
2/27/12 18 2/27/12 19
2/27/12 20
Category m Km Paramagnetism *increase in B is small *aligns with Bapp Order of (+10–5), depends on temperature
Diamagnetism Decrease in B is small aligns opposite Bapp Order of (–10–5) 1 – # Ferromagnetism High degree of alignment even in weak Bapp positive and large ~ m
