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Two exactly similar wires of steel
(Y, = 20 x 10" dyne/cm²) and copper (Y, = 12 ×
%3|
10" dyne/cm?) are stretched by equal forces. If
total elongation is 1 cm, then elongation of
copper wire is,
(a)
3/5 сm
(b)
5/3 cm
(c)
3/8 cm
(d)
5/8 cm

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