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A substance breaks down under a stress of 105 Pa. If the density of the substance is 2×103Kg/m3 , find the minimum length of the wire made of this substance which will break under its own weight (g= 10 m/s2)

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a
10 m
b
2.5 m
c
4 m
d
5 m

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detailed solution

Correct option is D

mgA=105⇒ALρgA=105⇒L=105ρg=5m

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