A-LevelPhysicsDeformation of solids9702/12 · May/June 2015 · Q321 Mark
When a thin metal wire is stretched, it becomes longer and thinner. This causes a change in the resistance of the wire. The volume of the wire remains constant. Which graph could represent the variation with extension x of the resistance R of the wire?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
A[Diagram A: R vs x graph, curve starting at positive R, increasing with an increasing gradient (concave up).]
B[Diagram B: R vs x graph, curve starting at positive R, decreasing with a decreasing gradient (concave down).]
C[Diagram C: R vs x graph, curve starting at positive R, decreasing with an increasing gradient (concave down).]
D[Diagram D: R vs x graph, curve starting at positive R, increasing with a decreasing gradient (concave down).]
✓ Correct answer
A: [Diagram A: R vs x graph, curve starting at positive R, increasing with an increasing gradient (concave up).]
Practise more questions on this topic
Oracle Prep sorts past-paper questions by topic, so you can drill Deformation of solids and see which topics are most likely to come up next.
Sign up free →