Magnets cannot be made from which of the following substances
Correct answer: C. Copper
- A. Iron
- B. Nickel
- C. Copper
- D. All of the above
Explanation
Magnets are typically made from materials that exhibit ferromagnetism, such as iron and nickel, because they have unpaired electrons that align to create a strong magnetic field. Copper, on the other hand, is diamagnetic and does not have the necessary magnetic properties to become a magnet. Therefore, the correct answer is Copper. The option 'All of the above' is incorrect because it includes iron and nickel, both of which can indeed form magnets.
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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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