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JAMB Physics 2014 Question 17

Question 17

Elasticity

From the diagram above, the point that represents the elastic limit is

Diagram for this question
  1. A.Q.
  2. B.R.
  3. C.S.
  4. D.T.
Show the answer and explanation

Answer: B (R.)

Explanation

Hooke's law holds on the straight part up to Q (limit of proportionality). The elastic limit is just after it, where the curve reaches R and the wire starts to yield. S is the maximum load and T the breaking point.