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One end of a horizontal thick copper wir...

One end of a horizontal thick copper wire of length `2L` and radius `2R` is welded to an end of another horizontal thin copper wire of length `L` and radius `R` .When the arrangement is stretched by applying forces at two ends , the ratio of the elongation in the thin wire to that in the thick wire is

A

0.5

B

0.25

C

4

D

2

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The correct Answer is:
D
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