Electromagnetism is based on the facst that (1) an electric current or a changing electric field produces a magnetic field, and (2) a changing magnetic field produces an electric field.
(Electromagnetism; is based; on the facst) (an electric current or a changing electric field; produces; a magnetic field) (a changing magnetic field; produces; an electric field)
Electromagnetism an electric current or a changing electric field a changing magnetic field
is based produces produces
on the facst
a magnetic field
an electric field