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HomePhysics14. The diagram shows stress v/s strain curve for the materials A and B. From the curves we infer that

14. The diagram shows stress v/s strain curve for the materials A and B. From the curves we infer that

(a)   A is brittle but B is ductile

             (b)   A is ductile and B is brittle

(c)   Both A and B are ductile

(d)   Both A and B are brittle

Explanation-(b) In ductile materials, yield point exist while in Brittle material, failure would occur without yielding.

(6)

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12. An ideal gas is taken through the cycle A→ B → C → A, as shown in the figure. If the net heat supplied to the gas in the cycle is 5 J, the work done by the gas in the process C → A is

(a)      – 5 J (b)  – 10 J (c)   – 15 J (d)  – 20 J Answer-a (126)

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