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Solution


Q.

Young’s moduli of the material of wires A and B are in the ratio of 1 : 4, while their areas of cross-section are in the ratio of 1 : 3. If the same amount of load is applied to both the wires, the amount of elongation produced in wires A and B will be in the ratio of [Assume length of wires A and B are same]                 [2023]
1 36 : 1  
2 12 : 1  
3 1 : 36  
4 1 : 12  

Ans.

(2)

ΔL=FLAY

ΔLAΔLB=ABAAYBYA=12