Which one of the following is ductile?
Correct answer: D. All of these
- A. Aluminium
- B. Copper
- C. Gold
- D. All of these
Explanation
The correct answer is Option D: All of these. Ductility is a physical property of materials that relates to their ability to be stretched into wires without breaking. Aluminium, Copper, and Gold are all known for their ductility. Aluminium is widely used in industries due to its combination of ductility and light weight. Copper is highly valued for its electrical conductivity and ductility, making it ideal for electrical wiring. Gold, although expensive, is extremely ductile and can be drawn into very fine wires. Therefore, since each of these metals is ductile, the correct choice is 'All of these'.
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About Physics of Solids
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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