( ( Electromagnet ( An electromagnet ) ) ( ( is ( ( a magnet ) ( made ( by ( ( wrapping ( ( a coil ) ( of wire ) ) ) ( around ( an ( iron ( or ( steel bar ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Electromagnet) (DT An) (NN electromagnet)) (VP (VBZ is) (NP (NP (DT a) (NN magnet)) (VP (VBN made) (PP (IN by) (S (VP (VBG wrapping) (NP (NP (DT a) (NN coil)) (PP (IN of) (NP (NN wire)))) (PP (IN around) (NP (DT an) (NN iron) (CC or) (NN steel) (NN bar))))))))) (. .)))
Electromagnet An electromagnet is a magnet made by wrapping a coil of wire around an iron or steel bar.
(ROOT (S (NP (NP (DT A) (NN solenoid) (CC or) (NN coil)) (VP (VBN wrapped) (PP (IN around) (NP (NN iron) (CC or) (JJ certain) (JJ other) (NNS metals))))) (VP (MD can) (VP (VB form) (NP (DT a) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (NN electromagnet)))) (. .)))
A solenoid or coil wrapped around iron or certain other metals can form a(n) electromagnet.