an electromagnet is made of coiled wires, iron core, and source of electricity
copper is electrical_conductor. electromagnet is magnet. electromagnetism is magnetism. electromagnetism is physics. electromyograph is electrical_device. electro_magnetic_ibt is information_bearing_wave_propagation. elastance_unit is electromagnetic_unit. electro_magnetic_ibt is not information_bearing_wave_propagation. electromagnet is not magnet. electromagnetism is not magnetism.