Magnetic ---refers to the magnetic properties of metals; in practical terms, permanent magnets, electrical materials can be made from magnetic materials (metals), and magnetic materials can be used to check for cracks in magnetic metals. Electromagnetic induction ---the phenomenon that the magnetic flux through the closed loop changes, and the electromotive force is generated in the loop is called electromagnetic induction; thus the electromotive force is called induced electromotive force. If the conductor is a closed loop, there will be current flowing, and the current is called Inductive current; transformers, generators, and various inductors all work according to the principle of electromagnetic induction. Email : peng@hata-ndt.com
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