Question

The length of a metal wire is l1, when the tension in it is T1, and is l2 when the tension is T2. The natural length of wire is

• A. $\frac{l_1+l_2}{2}$
• B. $\sqrt{l_1l_2}$
• C. $\frac{l_1T_2-l_2T_1}{T_2-T_1}$
• D. $\frac{l_1T_2+l_2T_1}{T_2+T_1}$

Answer 1

Answer: (C)

$\frac{l_1T_2-l_2T_1}{T_2-T_1}$

Answer 2

The correct option is (C) : $\frac{l_1T_2-l_2T_1}{T_2-T_1}$