Capacitance of conductor capacitor electric field energy and energy density.
导体的电容；电容器。电场的能量和能量密度。
Week 13 Capacitance of conductor, capacitor, electric field energy and energy density.
第13周导体的电容；电容器。电场的能量和能量密度。
Week 16 Energy of point charges system, energy of electric field in capacitor , energy and its density of electric field.
第16周点电荷系的能量；带电电容器储存的能量；电场的能量和能量密度；应用举例。
Week 16 Energy of point charges system, energy of electric field in capacitor , energy and its density of electric field.
第16周点电荷系的能量；带电电容器储存的能量；电场的能量和能量密度；应用举例。
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