P1-1 Whatis electromagnetics?(什么是电磁学?) P1-2 What are the threeessential steps in building an idealized model for the study of a scientific subject?(为研究科学学科二建立一种理想化模型的三个主要步骤是什么?) P1-3 What are the four fundamental SI units in electromagnetics?(电磁学中的四个基本国际单位制单位是什么?) P1-4 What are the four fundamental field quantities in the electromagnetic model?What are their units?(电磁学中的四个基本场量是什么?它们的单位是什么?) P1-5 What are the three universal constants in the electromagnetic model,and?What are their relations?(电磁模型中的三个普适常数是什么?它们的关系是什么?) P1-6 What are the source quantities in the electromagnetic model,and?(什么是电磁模型的源量?)