[电] joule's law of electric heating

yī diàn rè de jiāo ěr dìng lǜ ㄧ ㄉㄧㄢˋ ㄖㄜˋ ㄉㄜ˙ ㄐㄧㄠ ㄦˇ ㄉㄧㄥˋ lv4