One end of a horizontal thick co2R is welded to an end of another hori

1.	One end of a horizontal thick co2R is welded to an end of another horizontal thilength L and radius R. When the arrangement is stretchetsapplying forces at two ends, the ratio of the elongation in tewire to that in the thick wire is(a) 0.25(c) 2.00pper wire of length 21copper winein the[JEE (Advanced) 2013(b) 0.50(d) 4.00mgl formula would give Y if mgis doubled
Answer» = F/π(2R)2/∆ℓ12L = F/πR2/∆ℓ2/L ∴ ∆ℓ2/∆ℓ1= 2

One end of a horizontal thick co2R is welded to an end of another horizontal thilength L and radius R. When the arrangement is stretchetsapplying forces at two ends, the ratio of the elongation in tewire to that in the thick wire is(a) 0.25(c) 2.00pper wire of length 21copper winein the[JEE (Advanced) 2013(b) 0.50(d) 4.00mgl formula would give Y if mgis doubled

Answer»

= F/π(2R)2/∆ℓ12L = F/πR2/∆ℓ2/L

∴ ∆ℓ2/∆ℓ1= 2

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