Electromagnetic waves are produced when _____.
Aan electric charge vibrates or accelerates
Bthere is exertion of magnetic forces on charged particles
Cthere is alignment of an electric field and a magnetic field
Da magnetic change occurs in a medium
Aan electric charge vibrates or accelerates
Bthere is exertion of magnetic forces on charged particles
Cthere is alignment of an electric field and a magnetic field
Da magnetic change occurs in a medium