51_Ch27_Magnetic_fld

# 51_Ch27_Magnetic_fld - MagneticField&ForcesCh.27...

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Magnetism  (sec. 27.1)   Magnetic field    (sec. 27.2)   Magnetic field lines and magnetic flux (sec. 27.3)   Motion of charges in a  B  field  (sec. 27.4)   Applications - moving charged particles (sec. 27.5)    Magnetic force on  conductor with current  (sec. 27.6)   Force and torque on a current loop  (sec. 27.7)   Direct current motor (sec. 27.8)    The Hall effect (sec. 27.9) C 2009 J. Becker

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Learning Goals  - we will learn: Ch 27 • The nature of the force that a moving  charged particle  experiences in a  magnetic field . • How to analyze the motion of a charged particle in a  magnetic field. • How to analyze and calculate the  magnetic forces  on current-carrying  conductors and  loops.
Forces between bar  magnets  (or permanent magnets )

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Earth’s magnetic field  (Note the N-S polls of magnet!)
The Van Allen radiation belts around the  Earth

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Magnetic force acting on a moving  (+) charge
Compass over a horizontal  current-carrying wire

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Magnetic field lines associated with a permanent magnet, coil, iron-core  electromagnet, current in wire, current loop
MAGNETIC FLUX  through an area  element  dA

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Orbit of a charged particle in a  uniform magnetic field is a  circle   R = m v / q B
Velocity selector for charged particles uses perpendicular  E  and  B   fields q v B = q E     v = E / B

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51_Ch27_Magnetic_fld - MagneticField&ForcesCh.27...

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