When a magnetic substance is heated then it
Correct answer: B. Loses its magnetism
- A. Remains the same
- B. Loses its magnetism
- C. Becomes a strong magnet
- D. Either (a) or (c)
Explanation
The correct answer is that when a magnetic substance is heated, it loses its magnetism. This is because the thermal energy disrupts the alignment of the magnetic domains, causing the material to lose its magnetic properties. This effect is particularly noticeable when the temperature exceeds the Curie point, the temperature at which a ferromagnetic material becomes paramagnetic. Option A is incorrect as the properties do change with temperature. Option C is incorrect because heating generally weakens magnetism. Option D is incorrect because it presents mutually exclusive outcomes that are not supported by the behaviour of magnetic substances.
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Solids are compared through crystal structure, amorphous arrangement, elasticity, plastic deformation, stress, strain and Young’s modulus. Electrical behavior depends on available charge carriers and band structure, so conductors, insulators and semiconductors must be distinguished from mechanical properties such as strength, stiffness and brittleness.
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