A wire elongates by 1.0mm when a load W is hanged from it. If this wire goes over a pulley, and two weights W each are hung at the two ends, the elongation of the wire will be
A
0.5mm
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B
1.0mm
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C
2.0mm
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D
4.0mm
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Solution
The correct option is B1.0mm
ΔL=FlAY In both the cases all four quantities are same , extention is same for both cases which is 1mm