Electricity and Magnetism

action activity alignment amount animals applications atoms attract battery become body brain called carry cars cause cells channels chapter circuit coil companies compass components computers conductor contains continue described devices direction early Earth’s effects electric charges electromagnetic electronics energy engine equipment example experience field flow force frequency fuel ground heart human important induction iron less light lines machine magnetic field material means membrane metal motion motors move muscles natural object occurs operate opposite original particles path perform person physicists physics poles potential present problem produce provides radio reaction record resistance result scientists shows signal sometimes sound space strong tape tiny tion trains transformer transistors turns understand United usually voltage wave wire