'Wrap a wire around an iron bar, send a current through the wire & you've made one of these'
an electromagnet
ELECTRICITY: Wrap a wire around an iron bar, send a current through the wire & youve made one of these
Wrap a wire around an iron bar, send a current through the wire & you've made one of these
Wrap a wire around an iron bar, send a current through the wire & you've made one of these
ELECTRICITY
an electromagnet
ELECTRICITY