. "magnetism produced by an electric current; \"electromagnetism was discovered when it was observed that a copper wire carrying an electric current can magnetize pieces of iron or steel near it\""@en-us . "107815796"@en-us . . . . . . . . . . "111479368"^^ . . . "110738924"@en-us . "0"^^ . . . "electromagnetism"@en-us . "magnetism produced by an electric current; \"electromagnetism was discovered when it was observed that a copper wire carrying an electric current can magnetize pieces of iron or steel near it\""@en-us . . . "electromagnetism"^^ . . "11479368-n"^^ . "0"^^ . . .