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thanhduyen20001022
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1.Phương pháp mạ điện dựa trên tác dụng nào của dòng điện 2.Em hãy cho biết: Loại bóng đèn nào có nguyên tắc hoạt động dựa trên: a) sự phát sáng của một vật khi vật được nung nóng đến nhiệt độ cao. b) sự phát sáng của chất khí khi có dòng điện đi qua. c) sự phát sáng của chất bán dẫn khi có dòng điện đi qua
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