# Lec16 - Lecture 16 Lecture 16-1 Two Perpendicular Currents...

This preview shows pages 1–6. Sign up to view the full content.

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

View Full Document

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

View Full Document

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Lecture 16 Lecture 16-1 Two Perpendicular Currents I 1 I 2 F B 1,2 F B 1,3 I 3 B B F B2,1 Lecture 16 Lecture 16-2 Parallel Currents Continued I I (a) (b) R I B b I B a 2 2(/2) 2 b I B R I R μ π μ π =⋅ = a B = Lecture 16 Lecture 16-3 Force on a Moving Charge near a Current (a) (b) (c) I q>0 B B B Magnetic Force (c) (a) (b) zero Lecture 16 Lecture 16-4 Ampere’s Law in Magnetostatics The path integral of the dot product of magnetic field and unit vector along a closed loop, Amperianloop , is proportional to the net current encircled by the loop, t C C C Bdl Bdl I μ = = ∫ ∫ caa i I I • Choosing a direction of integration. • A current is positive if it flows along the RHR normal direction of the Amperian loop, as defined by the direction of integration. Biot-Savart’sLaw can be used to derive another relation: Ampere’s Law 1 2 ( ) ii μ − Lecture 16 Lecture 16-5 Example: Magnetic field of a long wire 2 C Bdl rB I π μ = = ∫ caa i I 2 I B r μ π = outside the wire inside the wire 2 2 2 C Bdl rB r I R π π μ π = = ∫ caa i I 2 2 I B r R μ π = Lecture 16...
View Full Document

## This note was uploaded on 04/07/2008 for the course PHYS 241 taught by Professor Wei during the Spring '08 term at Purdue.

### Page1 / 14

Lec16 - Lecture 16 Lecture 16-1 Two Perpendicular Currents...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online