Lecture-10-02-14-08

Lecture-10-02-14-08 - B-field I d l Magnetic force is...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Lecture-10 Hour Exam I Grade Distribution Range of grades : 33 - 96 Number of Grades 30 20 10 0 40 60 80 100 Grade <Average= 65.9>
Background image of page 1

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

View Full DocumentRight Arrow Icon
2 Demonstration: magnetic poles: North and South poles lines of force
Background image of page 2
3 Magnetic Lines of Force Follow directions of force acting on a pole of a magnet. S N
Background image of page 3

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

View Full DocumentRight Arrow Icon
4 Electric Current Produces Magnetic Field Demonstration: Lines of force figurate Similarity of current loop and bar magnet Dipole Fields Line of current Ring of Loop of electrical current produces magnetic lines of force, similar to those of bar magnet, i.e., magnetic dipole . Magnetic dipole is analogous to electric dipole . No magnetic monopole has been found, in contrast to electric point charge. Magnetic lines of force always figurate. Magnetic dipole Electric
Background image of page 4
5 Force on a current carrying wire of current I and length l: Units : [N] = [C/s] [M] [B] [ B ] = [N s/(CM)] [T ( Tesla )] Magnetic force B-field I d l Magnetic force
Background image of page 5

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

View Full DocumentRight Arrow Icon
Background image of page 6
Background image of page 7

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

View Full DocumentRight Arrow Icon
Background image of page 8
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: B-field I d l Magnetic force is related to cross product of current-carrying wire element (as a vector) and magnetic field. Magnetic force obeys right-hand rule . in reverse B l I F magnetic r r r = 6 Magnetic field can be measured by force on current carrying wire . 7 Example Problem HW-10-3. (HRW 28-18) An electron is accelerated from rest by a potential difference of 350 V. It then enters a uniform magnetic field of magnitude 200 mT with its velocity perpendicular to the field. Calculate (a) the speed of the electron and (b) the radius of its path in the magnetic field. 8 Example Problem HRW 28-67 Physicist S. A. Goudsmit devised a method for measuring the mass of heavy ions by timing their period of revolution in a known magnetic field. A singly charged ion of iodine makes 7.00 rev in a 45.0 mT field in 1.29 ms. Calculate its mass in atomic mass units....
View Full Document

This note was uploaded on 02/20/2008 for the course PHYSIC 2 taught by Professor Kim during the Spring '08 term at Lehigh University .

Page1 / 8

Lecture-10-02-14-08 - B-field I d l Magnetic force is...

This preview shows document pages 1 - 8. Sign up to view the full document.

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