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The stress-strain graphs for materials, A and B are shown in fig.

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The stress-strain graphs for materials, A and B are shown in fig.

The graphs are drawn to the same scale.

(a) Which of the material has greater of Young's modulus?

(b) Which of the two is the stronger material?

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(a) Material A has greater value of Y. It is because the slope of the graph of material is larger than that of A and thus for producing same strain more stress is required.

(b) Material A is stronger of the two materials. It is because, it can bear greater stress because the wire of this material breaks.

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