What this practice covers
These questions are drawn from past CIE 9702 Physics papers and filtered to deformation of solids. You answer, you find out immediately whether you were right, and you get the reasoning for the correct option and for each distractor. Wrong answers go to a mistakes locker so you can come back to exactly those.
Practice is free. You need an account only so your progress and your mistakes are still there next time.
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What examiners see students get wrong here
These are the errors that cost marks on deformation of solids, taken from our own topic notes. Read them before you practise and you will recognise the traps in the questions.
- Using the total length rather than the extension in F = kx.
- Confusing the limit of proportionality with the elastic limit.
- Using the diameter instead of the radius when finding the cross-sectional area.
- Giving strain a unit.
- Saying a thicker wire of the same material has a larger Young modulus.
- Omitting the ½ in the elastic potential energy.
- Reading the Young modulus off a force-extension graph instead of a stress-strain graph.
- Saying a material that does not obey Hooke's law cannot be elastic.
Revise it first
If any of the above is unfamiliar, work through the notes before practising: Deformation of solids revision notes.