Elasticity MCQs

21. Question

Which of the following is dimensionless quantity?




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22. Question

A wire of length L, radius r, when stretched with a force F, changes in length l. what will be the change in length in a wire of same material having length 2 L, radius 2 r and stretched by a force of 2 F (MPPMT 80, 96)




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23. Question

The energy per unit volume of a stretched wire is,




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24. Question

A steel ring of radius r and cross sectional area A is fitted onto a wooden disc of radius R(R > r). If the Young’s modulus of steel is Y, then the force with which the steel ring is expanded is, (Andhra 86)




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25. Question

Four wires whose lengths and diameter respectively are given below are made of the same material. Which of these will have the largest extension when same tension is applied? (MHTCET2001)




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