On applying a stress of $20 \times {10^8}N/{m^2}$ the length of a perfectly elastic wire is doubled. Its Young’s modulus will be
On applying a stress of $20 \times {10^8}N/{m^2}$ the length of a perfectly elastic wire is doubled. Its Young’s modulus will be
- A
$40 \times {10^8}N/{m^2}$
- B
$20 \times {10^8}N/{m^2}$
- C
$10 \times {10^8}N/{m^2}$
- D
$5 \times {10^8}N/{m^2}$
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