The above figure shows elastic behaviour of three wires P,Q abd R of different materials and cross sectional areas, when subjected to longitudinal stress then

elasticity of wire P is minimum

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elasticity of wire R is minimum

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area of cross section of wire P is minimum

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both(2) and (3)

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Solution

The correct option is B elasticity of wire R is minimum
$\begin{matrix} modulus of eleasticity = \frac{Stress}{Strain} So y_{p} > y_{Q} > y_{R} So elasticity of wire R is minimum \end{matrix}$

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Similar questions

Four wires of same materials have the following dimensions:
Wire $1$ : Length $l$ , Cross section area $A$
Wire $2$ : Length $l$ , Cross section area $2 A$
Wire $3$ : Length $0.5 l$ , Cross section area $1.5 A$
Wire $4$ : Length $2 l$ , Cross section area $0.5 A$

Which wire has the highest resistance?