| 介质损耗与电磁能量 |
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| 引用本文： | 罗凌霄.介质损耗与电磁能量[J].大学物理,2010,29(1). |
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| 作者姓名： | 罗凌霄 |
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| 作者单位： | 大理学院,物理与电子信息学院,云南,大理,671003 |
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| 摘 要： | 根据能流密度公式,推出时谐场中存在线性有损介质情形的坡印亭定理.与能量守恒定律结合,得到极化损耗、磁化损耗和焦耳损耗功率密度公式,以及有损介质中的电磁场能量密度公式.最后,推出上述各量的平均值公式.
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| 关 键 词： | 介质损耗 功率密度 电磁场能量密度 |
Medium loss and electromagnetic energy |
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| LUO Ling-xiao.Medium loss and electromagnetic energy[J].College Physics,2010,29(1). |
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| Authors: | LUO Ling-xiao |
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| Institution: | College of Physics and Electronic Information;Dali University;Dali;Yunnan 671003;China |
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| Abstract: | Based on the energy-flux density formula,we deduce the Poynting theorem in the presence of simple harmonic field and loss medium. Combined with the law of conservation energy,we get the power density formula of polarization loss,magnetization loss and Joule loss and electromagnetic energy density formula in loss medium. Finally we get the average value formula of above-mentioned quantity. |
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| Keywords: | medium loss power density electromagnetic energy density |
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