導電體and絕緣體

The basic physics principle is that all metals are conductors and non-metals (except carbon) are insulators.
Based on this principle, just think which articles are made of metals and which are made of non-metlas. You could easily find the answer yourself.

導電體:

銅板 copperplate

鐵棒 pontil

鋁 aluminium

鎳, 鎳幣 nickel

鉍 bismuth

銀幣; 銀器; 銀制用具 silver

鉬 molybdenum

水 water

鉛 lead

鋼 steel



絕緣體:

木板 wood

塑膠 plastic

紙 paper

泥 mud

石 stone

頭髮 hair

羽毛 feather

樹葉 leaf

花瓣 petal

陶器 pottery

咁寫法，十萬個都寫到，係你枱面都搵到十幾樣，點算係問題。