Physics · 2019
JEE Main · 8 April 2019, Shift 2 · Q9
Young's moduli of two wires A and B are in the ratio 7: 4. Wire A is 2 m long and has radius R. Wire B is 1.5 m long and has radius 2 mm. If the two…
Young's moduli of two wires A and B are in the ratio $\displaystyle 7$ : 4. Wire A is $\displaystyle 2$ m long and has radius R . Wire B is $\displaystyle 1.5$ m long and has radius $\displaystyle 2$ mm. If the two wires stretch by the same length for a given load, then the value of R is close to :
Official answer
(3)
1.$\displaystyle 7$ mm
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.