What Are BH Curve and Hysteresis in Magnetic Materials?

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The BH curve represents the relationship between magnetic induction (B) and magnetizing force (H) in magnetic materials, illustrating how a material responds to an external magnetic field. Hysteresis refers to the lag between the changes in magnetization of a material and the changes in the external magnetic field, often visualized in the BH curve as a loop. This phenomenon indicates that the magnetic properties of a material depend on its magnetic history. Understanding these concepts is crucial for applications in electromagnetism and magnetic material design. Comprehensive resources can be found online for further exploration.
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i have to submit an assignment tomrrow morning

please tell me what BH curve is
what is hysteresis

i need matter all links are welcome
 
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