Lecture22 - 1 Physics 132-Winter 2008 Prof Jim Beatty-Ohio...

Info iconThis preview shows pages 1–4. 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 Document Right Arrow Icon

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

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: 1 February 27, 2008 Physics 132-Winter 2008 Prof. Jim Beatty-Ohio State 1 Physics 132 Introductory Physics: Electricity and Magnetism Winter Quarter 2008 Lecture 22 February 27, 2008 Physics 132-Winter 2008 Prof. Jim Beatty-Ohio State 2 Right Hand Rules • There are different (related) right hand rules to use for: – Getting force direction on particle or current from a B field. (Force Law) – Getting the direction of a B field from a current. (Biot-Savart) – Getting the positive direction for the surface normal in Ampere’s Law. • These are all essentially tricks to help you remember the direction of a cross product • In each case, you need to know what physical quantity corresponds to what part of your hand… 2 February 27, 2008 Physics 132-Winter 2008 Prof. Jim Beatty-Ohio State 3 Ampere’s Law Gauss’ Law: E • d A = Q enc ε o closed surface ∫ Ampere’s Law: B • d s = μ i enc closed loop ∫ True for any closed loop! i enc is the sum of all currents passing through any surface enclosed by the loop. Signs given by right hand rule. February 27, 2008 Physics 132-Winter 2008 Prof. Jim Beatty-Ohio State 4 Solenoids i i A coil of current wound around a cylinder is a common way to make a region containing a fairly uniform magnetic field. If the coils are close together and the solenoid is infinitely long, B inside is uniform and B outside is zero! 3 February 27, 2008 Physics 132-Winter 2008 Prof. Jim Beatty-Ohio StateProf....
View Full Document

{[ snackBarMessage ]}

Page1 / 8

Lecture22 - 1 Physics 132-Winter 2008 Prof Jim Beatty-Ohio...

This preview shows document pages 1 - 4. Sign up to view the full document.

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