Flame Institute SCF 18 Near Chawla Lights Phase 7 Mohali Chandigarh 9888949978
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  • Flame SCF 18 Near Chawla Lights Ph-7 Mohali 9888949978

28.  Steel and copper wires of same length are stretched by the same weight one after the other. Young’s modulus of steel and copper are

28.  Steel and copper wires of same length are stretched by the same weight one after the other. Young’s modulus of steel and copper are 2×1011 N/m2  and 1.2×1011 N/m2 . The ratio of increase in length

(a)  2/5                                           (b)    3/5

(c)   5/4                                          (d)   5/2

ANSWER-B

 

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