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5. The strain-stress curves of three wires of different materials are shown in the figure. P, Q and R are the elastic limits of the wires. The figure shows that

(a)   Elasticity of wire P is maximum

(b)   Elasticity of wire Q is maximum

(c)   Tensile strength of R is maximum

(d)   None of the above is true

Answer-d

(4)

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