One end of a steel wire of radius ' $r$ ' is fixed to a ceiling and a load of $3 \mathrm{~kg}$ is attached…
One end of a steel wire of radius ' $r$ ' is fixed to a ceiling and a load of $3 \mathrm{~kg}$ is attached to the free end of the wire. Another wire made of copper of radius ' $2 r$ ' is attached to the bottom of $3 \mathrm{~kg}$ load and a $2 \mathrm{~kg}$ load is attached to the free end of the copper wire. The ratio of longitudinal strains produced in copper and steel wires is
(Young modulus of steel $=20 \times 10^{10} \mathrm{Nm}^{-2}$ )
(Young modulus of copper $=12 \times 10^{10} \mathrm{Nm}^{-2}$ )