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Solution


Q.

Young's modulus of material of a wire of length 'L' and cross-sectional area A is Y. If the length of the wire is doubled and cross-sectional area is halved then Young's modulus will be                         [2024]
1 Y/4  
2 4Y  
3 Y  
4 2Y  

Ans.

(3)   

Young's modulus depends on the material not on length and cross-sectional area. So young's modulus remains same.