. Diameter should now be, in mm

If 5 m long aluminium wire of diameter 3 mm supports a 40 kg mass. In order to have the same elongation in a copper wire  of the same length under the same weight

A. 1.75

B. 2.0   

C. 2.3

D. 5.0


Best Answer

Ans :C


If the elongation in both wires (of same length) are same under the same weight, then d2y constant 


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