141001
A composite steel rod $P Q R$ is made of two rods $P Q$ and $Q R$ as shown in figure. The lengths of two rods $P Q$ and $Q R$ are $20 \mathrm{~cm}$ and $10 \mathrm{~cm}$ respectively. The area of cross-section of the longer rod is $2 \times 10^{-4} \mathrm{~m}^{2}$ and that of the shorter $\operatorname{rod}$ is $1 \times 10^{-4} \mathrm{~m}^{2}$. If the composite $\operatorname{rod}$ is stretched with a force of $50 \times 10^{3} \mathrm{~N}$, the total elongation produced is
(Young's modulus of steel $=20 \times 10^{10} \mathrm{Nm}^{-2}$ )
141001
A composite steel rod $P Q R$ is made of two rods $P Q$ and $Q R$ as shown in figure. The lengths of two rods $P Q$ and $Q R$ are $20 \mathrm{~cm}$ and $10 \mathrm{~cm}$ respectively. The area of cross-section of the longer rod is $2 \times 10^{-4} \mathrm{~m}^{2}$ and that of the shorter $\operatorname{rod}$ is $1 \times 10^{-4} \mathrm{~m}^{2}$. If the composite $\operatorname{rod}$ is stretched with a force of $50 \times 10^{3} \mathrm{~N}$, the total elongation produced is
(Young's modulus of steel $=20 \times 10^{10} \mathrm{Nm}^{-2}$ )
141001
A composite steel rod $P Q R$ is made of two rods $P Q$ and $Q R$ as shown in figure. The lengths of two rods $P Q$ and $Q R$ are $20 \mathrm{~cm}$ and $10 \mathrm{~cm}$ respectively. The area of cross-section of the longer rod is $2 \times 10^{-4} \mathrm{~m}^{2}$ and that of the shorter $\operatorname{rod}$ is $1 \times 10^{-4} \mathrm{~m}^{2}$. If the composite $\operatorname{rod}$ is stretched with a force of $50 \times 10^{3} \mathrm{~N}$, the total elongation produced is
(Young's modulus of steel $=20 \times 10^{10} \mathrm{Nm}^{-2}$ )
141001
A composite steel rod $P Q R$ is made of two rods $P Q$ and $Q R$ as shown in figure. The lengths of two rods $P Q$ and $Q R$ are $20 \mathrm{~cm}$ and $10 \mathrm{~cm}$ respectively. The area of cross-section of the longer rod is $2 \times 10^{-4} \mathrm{~m}^{2}$ and that of the shorter $\operatorname{rod}$ is $1 \times 10^{-4} \mathrm{~m}^{2}$. If the composite $\operatorname{rod}$ is stretched with a force of $50 \times 10^{3} \mathrm{~N}$, the total elongation produced is
(Young's modulus of steel $=20 \times 10^{10} \mathrm{Nm}^{-2}$ )