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20.6 Force between Two Parallel Wires Wire #1 has a magnetic field that produces a force on wire #2. 20.7 Solenoids and Electromagnets The magnetic field of the coil can be increased by adding an iron core. 20.9 Torque on a Current Loop Torque = (Force)(Lever Arm) = NIAB sin θ.
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20.6 Force between Two Parallel Wires • Wire #1 has a magnetic field that produces a force on wire #2 APHY201
20.7 Solenoids and Electromagnets • The magnetic field of the coil can be increased by adding an iron core. APHY201
20.9 Torque on a Current Loop Torque = (Force)(Lever Arm) = NIAB sinθ APHY201
20.10 Applications APHY201
20.11 Mass Spectrometer • Determine a particle’s mass • Discovery of isotopes APHY201
20.12 Ferromagnetism • Magnetic domains: groups of aligned atoms • What do they look like? • The motion of electrons in atoms: orbiting and “spinning” • Most objects are non-magnetic since the electron motions are cancelled out by other electrons • Magnetic permeability B = Bo + BM APHY201
Determine the direction of the force on a positive charge. APHY201
Determine the direction of the velocity on a negative charge. APHY201