Mag. Field - PHY 2049C General Physics B Fields, Circuits,...

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

View Full Document Right Arrow Icon
PHY 2049C – General Physics B Fields, Circuits, Waves, Light Today: 1) Magnetic Fields 2) Forces and Torques from Magnetic Fields
Background image of page 1

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

View Full DocumentRight Arrow Icon
Magnetic Field Lines We draw magnetic field lines in the same way that we draw electric field lines. ± They do not cross ± They are smooth ± They point from the North-pole of a magnet towards the South pole In dealing with magnetic fields, we will also represent Vectors in 3d “looking at you” “flying away”
Background image of page 2
What does the Magnetic Field not do ? There is no such thing as the “magnetic charge”! Electric Field Charge in a uniform field feels a force There are many ways to separate “+” charges from “-” charges F + Magnetic Field No magnet feels a force in a uniform field, You can not separate a “N” from the “S”-pole All magnets are “Dipoles”
Background image of page 3

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

View Full DocumentRight Arrow Icon
Magnetic Poles You may remember that the “opposites attract” rule applies for magnetic poles. But there are no magnetic charges. The attraction between “N” and “S” comes from the inhomogenous field at the ends of a bar magnet. The magnets will be attracted into the “higher field” region or repelled toward the “lower field” region All magnets are “Dipoles” ! SN S N
Background image of page 4
Electric Dipoles in non-uniform Electric Field Dipoles in a non-uniform electric field are attracted to the “higher Field” region.
Background image of page 5

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

View Full DocumentRight Arrow Icon
Magnetic Attraction If we bring a “ferromagnetic” material into a magnetic field, the material acts like a magnet itself, which will attract to the first magnet .
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 31

Mag. Field - PHY 2049C General Physics B Fields, Circuits,...

This preview shows document pages 1 - 7. Sign up to view the full document.

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