lec32 Calendar
Lecture 31. Currents and Power

PHYS 1750: SELECTED TOPICS in PHYSICS
LECTURE 32. Magnetism

21.1-2. Magnets
1. Poles and orientation
2. Attraction and repulsion
3. Ferromagnetism
21.4.Magnetic Fields
1. Force on moving charges F = q*v*B*sin θ
2. Direction: right-hand-rule
3. Units: Tesla and Gauss (1 T = 10 4 G)
21.5.Motion of Charged Particles
1. Circular path perpendicular to B
a. F = q*v*B = m*v 2/r
b. r = m*v/q*B
2. Constant path parallel to B

Review Questions
Lecture 33: Magnetic Forces on Currents

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