7. The stress versus strain graphs for wires of two materials A and B are as shown in the figure.
The stress versus strain graphs for wires of two materials A and B are as shown in the figure. If Y1 and Y2 are the Young ‘s modulii of the materials, then
(a) YB = 2YA
(b) YA =YB
(c) YB = 3YA
(d) YA = 3YB
Answer-d
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a