1.

One end of a horizontal thick copper wire of length `2L` and radius `2R` is weded 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 isA. `0.25`B. `0.50`C. `2.00`D. `4.00`

Answer» Correct Answer - C
` Deltal = (FL)/((pir^(2))Y)`
`:. Deltal prop (L)/(r^(2)) `
`:. (Deltal_(1))/(Deltal_(2))=(L//R^(2))/(2L//(2R)^(2)) =2`


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