雨课堂学堂在线《University Physics(Electricity and Magnetism(云南大学)学堂云单元测试考核答案.pdf
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第1题
Lifewillnotbedifferentiftheelectronwerepositivelychargedand
theprotonwerenegativelycharged.
A
正确
B
错误
第2题
Aglassobjectispositivelychargedbyrubbingitwithasilkcloth.
Therefore,thepositivechargeswerecreatedontheglassobjectinthe
rubbingprocess.
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