JAMB 2024 Physics · Question 36
The property by which a material returns to its original shape after the removal of force is called
Options
- A.Elasticity
- B.Ductility
- C.Malleability
- D.Plasticity
Answer: A. Elasticity
Explanation written with AI and checked against the answer key
Step 1: Analyze the question The question asks for the property that lets a material go back to its original shape after the deforming force is removed.
Step 2: Explain the concepts
- Elasticity: The ability of a material to regain its original shape and size after the deforming force is removed (e.g., a spring or rubber band, within its elastic limit).
- Ductility: The ability of a material to be drawn into thin wires without breaking (e.g., copper).
- Malleability: The ability of a material to be hammered or rolled into thin sheets (e.g., gold, aluminium).
- Plasticity: The opposite of elasticity. The material stays permanently deformed after the force is removed (e.g., clay, or a metal stretched beyond its elastic limit).
Step 3: Match the definition to the options
- A. Elasticity: matches "returns to original shape". ✔
- B. Ductility: about drawing into wires. ✘
- C. Malleability: about forming sheets. ✘
- D. Plasticity: material does not return to its shape. ✘
Step 4: Answer The correct option is A. Elasticity.
Tip: Link the words to their meanings:
- Elasticity = Extends and then Escapes back to the original shape.
- Plasticity = Permanent change.
- Ductility = Draws into wire.
- Malleability = Makes sheets (hammering).
Also remember Hooke's law: a material is elastic only up to its elastic limit. Beyond that point, it behaves plastically.
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