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Physics · 2020
JEE Main · 7 January 2020, Shift 1 · Q9
Speed of a transverse wave on a straight wire (mass 6.0 g, length 60 cm and area of cross-section 1.0 mm^2 ) is 90 ms^-1. If the Young's modulus of…
Speed of a transverse wave on a straight wire (mass $\displaystyle 6.0$ g, length $\displaystyle 60$ cm and area of cross-section $\displaystyle 1.0 \mathrm{~mm}^2$ ) is $\displaystyle 90 \mathrm{~ms}^{-1}$. If the Young's modulus of wire is $\displaystyle 16 \times 10^{11} \mathrm{Nm}^{-2}$, the extension of wire over its natural length is :
Official answer
(1)
0.$\displaystyle 03$ mm
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JEE Main 2020 Physics question, with the answer from NTA’s final answer key. Where our answers come from.