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nhungduccong
2 năm trước
Câu 14: Dòng điện không gây ra tác dụng nào dưới đây? Hút các vụn giấy.Làm nóng dây dẫn.Làm quay kim nam châm.Làm tê liệt thần kinh. Câu 15: Sau khi cọ xát thanh thủy tinh vào mảnh lụa khô thì những vật nào nhiễm điện? Không có vật nào nhiễm điện.Cả mảnh lụa và thanh thủy tinh.Thanh thủy tinh.Mảnh lụa.
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