An iron rod of length $2m$ and cross section area of $50\,m{m^2}$, stretched by $0.5\, mm$, when a mass of $250\, kg$ is hung from its lower end. Young's modulus of the iron rod is
An iron rod of length $2m$ and cross section area of $50\,m{m^2}$, stretched by $0.5\, mm$, when a mass of $250\, kg$ is hung from its lower end. Young's modulus of the iron rod is
- A
$19.6 \times {10^{10}}\,N/{m^2}$
- B
$19.6 \times {10^{15}}\,N/{m^2}$
- C
$19.6 \times {10^{18}}\,N/{m^2}$
- D
$19.6 \times {10^{20}}\,N/{m^2}$
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