Materials suitable for making permanent magnets (such as Alnico or steel) are chosen primarily becau

Question

Materials suitable for making permanent magnets (such as Alnico or steel) are chosen primarily because they inherently possess

Professor PC Thomas Classes · Answer

(b) : Permanent magnets need to retain a strong magnetic field even in the absence of an external magnetizing field (high retentivity). They must also be resistant to demagnetization from stray external fields, temperature variations, or mechanical shock (high coercivity). Thus, materials like steel or Alnico with high retentivity and high coercivity are used.