JAMB 2024 Physics · Question 36

The property by which a material returns to its original shape after the removal of force is called

Options

  1. A.Elasticity
  2. B.Ductility
  3. C.Malleability
  4. 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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