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JEE MAIN 2021
20-07-21 S2
Question
The length of a metal wire is $\ell_1$, when the tension in it is $\mathrm{T}_1$ and is $\ell_2$ when the tension is $\mathrm{T}_2$. The natural length of the wire is
Select the correct option:
A
$\sqrt{\ell_1 \ell_2}$
B
$\frac{\ell_1 T_2-\ell_2 T_1}{T_2-T_1}$
C
$\frac{\ell_1 T_2+\ell_2 T_1}{T_2+T_1}$
D
$\frac{\ell_1+\ell_2}{2}$
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
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