The second principle is that of electro-magnetic induction: when a conductor of electricity (wire) is subjected to a changing magnetic field or is moved through a magnetic field, a current is induced in it.
(The second principle; is; that of electro-magnetic induction) (a conductor of electricity (wire; is subjected; to a changing magnetic field) (a conductor of electricity (wire; is moved; through a magnetic field) (a current; is induced; L:in it)
The second principle a conductor of electricity (wire a conductor of electricity (wire a current
is is subjected is moved is induced
that of electro-magnetic induction
to a changing magnetic field
through a magnetic field
L:in it