CBSE BoardEnglish MediumSTD 12 SciencePhysics5. Magnetism and matter1 Mark
MCQ
Demagnetisation of magnets can be done by
A
Rough handling
B
Heating
C
Magnetising in the opposite direction
✓
All the above
✓
Answer
Correct option: D.
All the above
d Demagnetization processes include heating past the Curie point, applying a strong magnetic field, applying alternating current, or hammering the metal. Demagnetization occurs naturally over time. The speed of the process depends on the material, the temperature, and other factors.
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