第2篇 电磁场与现代化电器.ppt

第二篇 电磁场与现代化电器 1 Electric Charge and Electric Field 2 Gauss’s Law 3 Ink-Jet Printing and Electrostatic Copier 4 Magnetism 5 Electromagnetic Induction Faraday’s Law 6 Maxwell’s Equations Electromagnetic Waves Ch.1 Electric Charge and Electric Field 1.1 Static Electricity; Electric Charge and Its Conserved Electricity + Magnetism Electromagnetism Faraday Law ? Maxwell Equations Static Electricity (静电学) Electric Charge (电荷) The Law of Conservation of Electric Charge (电荷守恒) 1.2 Electric Charge in the Atom 1.3 Coulomb’s Law Coulomb’s Law (2’) Ch.2 Gauss’ Law 2.1 Electric Flux The Density of Electric Field Line Gauss’ Law (1’) Gauss’ Law (1’30”) Ch.3 Ink-Jet Printing and Electrostatic Copier Charged Particle moving perpendicular to E Ink-Jet Printing (喷墨打印） Ch.4 Magnetism If you are outside on a dark night in the middle to high latitudes, you might be able to see an aurora, a ghostly “curtain” of light that hangs down from the sky. 4.1 Magnets and Magnetic Fields Electrostatics Charges at rest The Magnetism of Earth The Magnetism of Earth 4.2 Gauss’ Law for Magnetic Field Gauss’ Law for Magnetic Fields No Magnetic Monopoles 2’ 4.3 Force on an Electric Current in a Magnetic Fields Force on a Current in Nonuniform B 4.4 Force on Moving Charges in a Magnetic Fields Lorentz’ force and Ampere’s Force Circular Motion in a Constant Magnetic Field Helical Path (螺旋线) The Magnetic Bottle （磁瓶） Van Allen Radiation Belts（范艾伦辐射带） Van Allen Radiation Belts 40” Electric Currents Produce Magnetism Spin Magnetic Dipole Moment What causes the alignment ? Electromagnetic Rail Gun (电磁轨道炮) 4.6 Magnetic Materials－Ferromagnetism Diamagnetism (抗磁质) 1.Diamagnetism (抗磁质) 4.6.1 Magnetism and Electrons Orbital Magnetic Dipole Moment Spin Magnetic Dipole Moment 4.6.2 Torque on a Current Loop Force on a Current Loop i